Acousto-Optic Devices ······················PageMagneto-Optic Devices Faraday...

CASTECH®

Magneto-Optic Devices ····················Page.01Faraday Rotators ······················································Page.02

Free Space Isolators ··················································Page.04

Fiber To Free Space Isolators ········································Page.08

In-Line Isolators ·······················································Page.11

Optical Circulators ····················································Page.14

E-mail: [email protected] | www.castech.com

Contents

Acousto-Optic Devices ······················Page.16AO Q-Switches ·························································Page.17

AO Modulators ·························································Page.20

AO Frequency Shifters ················································Page.23

AO Deflectors ··························································Page.25

RF Drivers ······························································Page.27

Electro-Optic Devices ·······················Page.31BBO Pockels Cells ····················································Page.32

KD*P Pockels Cells ···················································Page.36

Pockels Cells Drivers ·················································Page.38

Laser Application Devices ··················Page.40Fiber Collimators ······················································Page.41

F-Theta Lenses ························································Page.43

Beam Expanders ·······················································Page.45

Attenuators ······························································Page.47

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Magneto-Optic Devices

Faraday Rotators

Free Space Isolators

Fiber To Free Space Isolators

In-Line Isolators

Optical Circulators


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Product Introduction

Faraday rotator provides non-reciprocal rotation while maintaining linear

polarization. That is, the polarization rotation due to the Faraday rotator is always in

the same relative direction. When the light transmission through the rotator that is face

to the forward direction, it will cause the positive rotation of 45°, or if the light face to

the reverse direction, it will cause the negative rotation of 45°. This is due to the

change in the relative magnetic field direction, positive one way, negative the other.

This then adds to a total of 90°when the light travels in the forward direction and then

the negative direction.

The Faraday rotators CASTECH provided , which the wavelength can reach from

the 355nm to 4500nm that used magneto-optical materials with high Verdet constant

and low absorption. Transmission of Faraday Rotator is achieved typically >98% and

the aperture is up to 25mm. The features of rotators are having high Damage

Threshold*, high power handling and accurate rotation of 45°±0.5°. CASTECH's

customized Faraday rotators are available.

Product list

l Laser sensing system

l Ultrafast laser system

l OCT system

l Laser detection etc

Applications

Faraday Rotators

Product number Type(t)

Power(p)

Aperture(a)

Wavelength(λ)

Wave plate(w)

Housing(h)

HPRO-t-p-a-λ-w-h FS(Common)

＜200W

≤5mm 355nm780nm850nm980nm1030nm1064nm1319nm2000nm

...

C(Containing)

A01,...

A02,...8/10 mm

≤12 mm A03,...N(Not Containing)

≥200W ≤10 mm A15,...

135°

0°

45°90°

Input

180°

Polarization Reference:·All Free Space Isolators non-reciprocally rotator the plane of polarized light in 45 degree. ·1/2 wave plate is customized for arbitrary out polarizations if required.

The schematic diagram of

faraday rotator

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Specifications

A01(Aperture≤ 5mm) A02 ( Aperture=8/10mm )

A03 ( Aperture≤12mm )

Dimensions(mm)

VIS NIR IR

Center Wavelength 405,532,561,632,650,780,808,850,980nm,... 1030,1064nm,.. 1319,2000,4500nm,...

Wavelength Range ±10nm ±15nm ±10nm

Peak Transmission >98% >98% >95%

M2 Degradation <10% <10% <10%

Clear Aperture 2,3,4,5,8,10,12mm or others 2,3,4,5,8,10,12mm or others 3,4mm or others

Optical Power(Average) 10,30,50W,100W or others 10,30,50,100W or others 10,30,50W or others

Damage Threshold* 10J/cm2 @ 10ns1J/cm2 @ 8ps

10J/cm2 @ 10ns1J/cm2 at 8ps 5J/cm2 @ 10ns

Cooling Water-cooled or Conduction-Cooled

Storage Temperature Range -10～70

OperatingTemperature Range 10～30

A15(Water-cooled ，Aperture≤10mm )

*Customized (wavelength, dimension, power handling, etc.) are available.*CASTECH provides the product specifications of specific models, please contact our company for more details.*At customer-specified wavelength and temperature.

/Dimensions



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Free space isolator according to its physical principles that can be divided into two

categories which are polarization dependent isolator and polarization independent

isolator.

The polarization dependent isolator, or Faraday isolator consists of three different

parts which are input polarizer (polarized vertically), Faraday rotator, and output

polarizer, called an analyser (polarized at 45°).

The polarization independent isolator consists of three main parts, which are input

birefringent beam displacer, Faraday rotator, 1/2 wave plate or an output birefringent

beam displacer. Usually the isolator used in the optical fiber laser system and it can

maintain the stability of optical system effectively.

The Free space isolators CASTECH provided , which the wavelength can reach

from the 355nm to 4500nm with simple and reliable mechanical structure, which used

high quality of crystals and optical components. CASTECH's Free space isolators have

peak isolation of 45dB, max transmission above 95%, and aperture up to 20mm.

CASTECH's customized Free space isolators are available.

l Lase precision machining

l Laser sensing system

l Ultrafast laser system

l OCT system

l Laser detection etc

Applications

Free Space Isolators


non-polarization-maintaining isolator


polarization-maintaining isolator


Power(p)

Aperture(a)

Wavelength(λ)

Wave plate(w)

Housing(h)

HPISO-t-p-a-λ-w-h

Polarization dependent

AB(AdjustableBroadband )

≤100W

2mm,3mm,4mm,5mm,6mm,10mm...

550-880nm,…

C(Containing)

N(Not Containing)

A03,...

FS(Free Space)

355nm，532nm,780nm,1030nm,1064nm,1319nm,1990

nm,...

A04、A06、A08、 A11、A12,...

DS(Dual Stage) A15,...

Polarization independence 1.5mm,2mm,3mm,4mm,5mm,...

980nm,1030nm,1064nm,... A16,...

Polarization Reference:•All Free Space Isolators non-reciprocally rotator the plane of polarized light in 45 degree.•1/2 wave plate is customized for arbitrary out polarizations if required.

135°

0°

45°90°

Input

180°

Product list

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Specifications

Free Space Isolators (Common)

UV VIS NIR IR

Center Wavelength 355nm,... 405-980nm,... 1030,1064nm,... 1319,2000,4500nm,...

Wavelength Range ±10nm ±10nm ±15nm ±10nm

Peak Transmission >95% >92% >95% >90%

Peak Isolation >35dB >35dB >35dB >35dB

M2 Degradation <10% <10% <10% <10%

Clear Aperture 2,2.5,3,4mm or others 2,3,4mm or others 2,3,4,5,8,10,12mm or others 3,4mm or others

Optical Power(Average) 1,5,10W or others 10,30,50W or others 10,30,50,100W or others 10,30,50W or others

Damage Threshold* 3.5J/cm2 @ 10ns 10J/cm2 @ 10ns 10J/cm2 @ 10ns 5J/cm2 @ 10ns


Operating Temperature Range 10～30

Dimensions(mm)A04(Aperture≤5mm) A06(Aperture=8/10mm)

A08(Aperture=12mm) A11(Aperture≤2.5mm) A12(IR，Aperture≤5mm)




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Dual Stage and Adjustable Broadband

Dimensions(mm)

Dual Stage

Center Wavelength 335,405,532, 980,1030nm,1064nm,...

Wavelength Range ±20nm

Peak Transmission >90%

Peak Isolation >45dB

M2 Degradation <10%

Clear Aperture 3,4,5mm, or otrher

Optical Power(Average) ≤100W or otrher

Peak Pulse Power 20KW or otrher

Damage Threshold* 10J/cm2 @ 10ns



A15(Dual Stage，Aperture≤3mm)

Adjustable Broadband

Adjustable wavelength range 550-750nm,...

Wavelength Range 500-800nm,...

Peak Transmission >93%

Peak Isolation >35dB

M2 Degradation <10%

Clear Aperture 3,4,5mm, or otrher

Optical Power(Average) ≤100W or otrher

Peak Pulse Power 30KW or others




A03(Adjustable Broadband)


SpecificationsSpecifications

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Specifications

Polarization Independent Isolator

Dimensions(mm)

Polarization Independent Isolator

Center Wavelength 980/1030/1064nm,...

Operating Wavelength Range ±10nm

Clear Aperture ≤10mm

Peak Isolation ≥35dB

Isolation in band at 23 ≥25dB

Insertion Loss at 23 ≤0.50dB

M2 Degradation <10%

Polarization Dependent Loss ≤0.15dB

Return Loss (Input/Output) ≥50dB

Optical Power(Average) 5,10,30,50W or others




A16(Aperture ≤5mm)




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Fiber-Free Space Isolators can be divided into two categories according to its

output mode: expanded-beam isolator and non-expanded-beam isolator.

The non-expanded-beam isolator consists of birefringent crystal, a Faraday rotator,

one 1/2 wave plate or a polarizer and collimator. Usually used in optical fiber laser

system, it can effectively maintain the stability of optical system.

The expanded-beam isolator consists of some major components of a collimator, a

birefringent crystal, a Faraday rotator, a wave plate or an optical rotating mirror and a

beam expanding mirror. The output spot has a large spot diameter and a small divergence

angle.

CASTECH created the Fiber-Free Space isolators, which adopted the high-quality

crystals and optical components with the precision beam expander sets, the peak

isolation of single-stage series can reach more than 35dB, and the peak isolation of dual-

stage series can reach more than 45dB, insertion loss ≤ 0.4dB. Its biggest feature is that

the product has no thermal lens effect when used at high power.CASTECH can

customize the Fiber-Free Space isolators according to customer needs.

Product list

l Fabrication of Fiber Laser

l Optical Fiber Sensor

l Laser gauge etc

Applications

Fiber-Free Space Isolators


Power(p)

Fiber type(f)

Wavelength(λ)

Pigtail diameter(e)

Beam diameter(b)

Stage(s)

Spot shape( d )

Housing(h)

HPISO-t-p-f-λ-e-b-s-d-h

WLP(With Laser Pointer)

≤200 W

1(10/125SCF)

2(20/130DCF)

3(12/250SCF)

4(20/250DCF)

5(30/250DCF)

6(PM 980)

…

980nm1030nm1064nm

...

C(6mm Armoured Cable)

E(8mm Armoured Cable)

L(900μm Loose Tube)

56789…

S(Single)

G(Gauss)

F(Flat-top)

A09,...

EB(Expanded Beam)

A02,A05,...

D(Dual)

A11,...

FF(Non-Expanded Beam)

S(Single)

A08,...

D(Dual)

/


fiber-free space isolators

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Specifications

Fiber-Free Space(Expanded-Beam)

Dimensions(mm)

Single Stage Dual Stage

Center Wavelength 980/1030/1064nm,... 980/1030/1064nm,...

Operating Wavelength Range ±10nm ±20nm

Peak Isolation ≥35dB ≥50dB

Isolation in band at 23 ≥25dB ≥40dB

Insertion Loss at 23 ≤0.4dB ≤0.6dB

Polarization Dependent Loss ≤0.15dB ≤0.15dB

Return Loss (Input/Output) ≥50dB ≥50dB

M2 Degradation <10% <10%

Beam Roundness ＞90%

Fiber Type LMA Fiber/ PM Fiber or others

Output Beam diameter(1/e2) 6,7,8mm or others

Optical Power(Average) 10,20,30,50,100,200,250,300W or others

Peak Pulse Power 10,20,30,50KW or others

Storage Temperature Range 10～50

Operating Temperature Range -10～70

A05(Single，Power≤120W)

A09(Isolator With Laser Pointer，Power≤50W) A11(Dual，Power≤100W)

A02(Single，Power≤50W)

*Customized (wavelength, dimension, power handling, etc.) are available.*CASTECH provides the product specifications of specific models, please contact our company for more details.



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Specifications

Fiber-Free Space(Non-Expanded Beam)

Dimensions(mm)

Non-Expanded Beam

Center Wavelength 980/1030/1064nm

Operating Wavelength Range ±10nm

Peak Isolation ≥35dB

Isolation in band at 23 ≥25dB

Insertion Loss at 23 ≤0.4dB

Return Loss (Input/Output) ≥50dB

M2 Degradation <10%

Beam Roundness ＞90%

Fiber Type LMA Fiber/PM Fiber or others

Output Beam diameter(1/e2) 0.5mm or others

Optical Power(Average) 10,20,30,50W,100W or others

Peak Pulse Power 10,20KW or others



A08(Power≤70W)


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Product Introduction In-line isolator can be divided into two categories according to the fiber types:

non-polarization-maintaining isolator and polarization-maintaining isolator.

The non-polarization-maintaining isolator consists of Birefringent crystal, a

Faraday rotator, a 1/2 wave plate or a polarizer , and a pair of collimators. Usually the

isolator used in the optical fiber laser system and it can maintain the stability of optical

system effectively.

The polarization-maintaining isolator is a laser device that can achieve the

transmission of linear polarization steadily and remain the polarization state

unchanged. It consists of major components of an input polarizer, a Faraday rotator, a

1/2 wave plate or a polarizer, an output polarizer, and a pair of collimators. In some

special applications, this type of isolator maintains the stability of the system‘s

polarization state. CASTECH's in-line isolators have an isolation of more than 30dB,

an insertion loss of less than 1.00dB, and an operating wavelength range of 850-

2000nm. The form of connection of the fiber tail can be adopted by FC/PC or bare

fiber. CASTECH can customize the in-line isolator according to customer needs.

Product list

l Fiber laser detection

l Optical coherence detection

l Laser sensing

l Laser communication etc

Applications

In-Line Isolators


Power(p)

Fiber type(f)

Wavelength(λ)

End Diameter(e)

Fiber length(l)

Wave plate(b)

Housing(h)

HPISO-t-p-f-λ-e-1-b-h

Polarization dependent

C(Common)

≤100 W

2(PM10/125SCF)

3(PM20/130DCF)

6(M30/250DCF)

7(PM 980)

...

980nm,1030nm,1064nm,

...


B(3mm Loose Tube)

1(1m)

2(1.5m)

…

C(Containing)

N(Not Containing)

A01,A06,A10,...

EB(Expanded

Beam)A11,...

Polarization independence

C(Common)

1(HI1060)

2(10/125SCF)

3(20/130DCF)

4(12/250DCF)

5(20/250DCF)

6(30/250DCF)

…

A03,A06,A08,...

EB(Expanded

Beam)A11,...

TRI(Tri-port)

A01,...

non-polarization-maintaining isolator

polarization-maintaining isolator



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Specifications

In-Line Isolators(Non-polarization-maintaining)

Dimensions(mm)

Common Polarization-maintaining Tri-port

Center Wavelength 1030/1064nm 1030/1064nm 1030/1064nm

Operating Wavelength Range ±10nm ±10nm ±10nm

Peak Isolation ≥33dB ≥33dB ≥33dB

Isolation in band at 23 ≥25dB ≥25dB ≥25dB

Insertion Loss at 23 ≤1.00dB ≤1.00dB ≤1.00dB

Polarization Dependent Loss ≤0.15dB ≤0.15dB ≤0.15dB

Return Loss (Input/Output) ≥50dB ≥50dB ≥50dB

Fiber Type 10/125 SCF or others 10/125 SCF or others HI1060 or others

Optical Power(Average) 0.3,0.5,2,3,5,10W or others 50,100W or others 3,5,10W or others

Peak Pulse Power 5KW or others 10KW or others 10KW or others

Storage Temperature Range -10～70 -10～70 -10～70

Operating Temperature Range 10～50 10～50 10～50

Output Beam diameter(1/e2) / 4,5,6mm or others /

Extinction Ratio / / ≥20dB

A03(Power≤20W)

A06(Power≤0.3W)A08(Power≤120W)

A11(Non-polarization-maintaining，Power≤100W)

A01(Power≤10W)


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Specifications

In-Line Isolators(Polarization-maintaining)

Dimensions(mm)

Common Polarization-maintaining

Center Wavelength 1030/1064nm 1030/1064nm






Fiber Type PM980 or others PM980 or others

Optical Power(Average) 3,5,10W or others 50,100W or others

Peak Pulse Power 5KW or others 10KW or others

Operating Temperature Range 10～50 10～50

Storage Temperature Range -10～70 -10～70

Output Beam diameter(1/e2) / 4,5,6mm or others

Extinction Ratio ≥20dB ≥20dB

A01(Power≤10W) A06(Power≤0.3W)

A10(Power≤2W) A11(Polarization-maintaining，Power≤100W)




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Product Introduction The circulator is a multi-port device, and light can only propagate in a specific

direction. For example, if the signal is input from port 1, it will be output from port 2.If

the signal is input from port 2, it will be output from port 3, and output from other ports

will be very costly. Circulator according to its physical principles can be divided into non-

polarization-maintaining circulator and polarization-maintaining circulator.

The non-polarization-maintaining circulator is an irreversible one-way three-port

device, which consists of three birefringent beam displacers, polarization elements, a

Faraday rotator, 1/2 wave plate and three collimators. Polarization-independent optical

circulator.

The polarization-maintaining optical circulator consists of an input polarizer, a

Faraday rotator, a 1/2 wave plate, an output polarizer and three collimators. It is widely

used in many optical devices and many occasions. CASTECH's circulators have low

insertion loss, high isolation, low polarization dependent loss, excellent temperature

stability, center wavelength of 980-2000nm. The form of connection of the fiber tail can

be adopted by FC/PC or bare fiber. CASTECH can customize the circulator according to

customer needs.

Product list

l Fiber optical Sensor system

l Bidirectional Signal Transmission System

l Dispersion compensation

Applications

Optical Circulators


Power(p)

Fiber type(f)

Wavelength(λ)

End Diameter(e)

Fiber length(l)

Wave plate(b)

Housing(h)

HPISO-t-p-f-λ-e-1-b-h

C(Commom)

≤20 W

1(10/125SCF)

2(20/130DCF)

3(12/250DCF)

4(20/250DCF)

5(30/250DCF)

10(HI1060 )

…

980nm1030nm1064nm2000nm

...


B(3mm Loose Tube)

1(1m)

2(1.5m)

…

C(Containing)

N(Not Containing)

A03,...

A02,...TRI(Tri-port)

6(PM 980)

7(PM10/125SCF)

8(PM20/130DCF)

9(PM30/250DCF)

…

Polarization-maintaining circulator

Non-polarization-maintaining circulator

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Specifications

Dimensions(mm)

Non-polarization-maintaining Polarization-maintaining

Center Wavelength 980,1030,1064,2000nm... 980,1030,1064,2000nm...






Fiber Type HI1060 or others PM980 or others

Min. Crosstalk 45dB 45dB

Optical Power(Average) 3,5,10,20W or others 3,5,10,20W or others

Peak Pulse Power 10KW or others 10KW or others

Operating Temperature Range 10～50 10～50

Storage Temperature Range -10～70 -10～70

Extinction Ratio / ≥20dB

A02(Non-polarization-maintaining，Power≤20W) A03(Polarization-maintaining，Power≤10W)


Optical Circulators



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Acousto-Optic Devices

AO Q-Switches

AO Modulators

AO Frequency Shifters

AO Deflectors

RF Drivers

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Product Introduction The acousto-optic Q-switch (AOQS) is a special modulator that designed for

inside laser cavities. This type of product can minimize the insert loss and

supporting of high Damage Threshold*. It can diffract a portion of the laser flux

out from the cavity (Raman Nath or Bragg regime) when it applied the RF signal .

This increases the cavity losses and prevents oscillation. When the RF signal is

switched off, the cavity losses decrease rapidly and it will produce the evolves of

intense laser pulse. Our product equipped some special qualities such as the ultra-

low loss (up to 99.6%), high switching speeds, and premium pulse-to-pulse

stability.

CASTECH's AO Q-switch, which the wavelength can reach from the 355nm to

2000nm that used utilize materials with high optical power handling such as fused

silica or crystal quartz. In order to maintain high efficiency with these materials,

higher RF powers are necessary and therefore require adequate conduction or water

cooling. CASTECH's customized AO Q-switch are available.

Product list

Applications

AO Q-Switches

Product number RF(f)

Aperture(a)

Material(m)

Mode(t)

Wavelength(w)

RF connector(c)

Housing(h)

CAQS-f-a-mt-w-c-h

27.12 MHz

1-8mm

FS(Fused Silica)

C(Compressional)

1064nm,... BNCA08,...

A01,A02,...40.68 MHz

CQ(Crystal Quartz)

355,1312,1030,1064nm,...

SMA,BNC,MMCX,… A05,...68 MHz

1-6mm A01,A02,...80 MHz DF

(Dense Flint)1047-1064nm,... SMA,BNC,… A09,...

l Laser marking

l Lithography

l Material processing

l Medical surgery

l Micromachining

The schematic diagram of AO Q-switch



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Dimensions(mm)

Water-cooled AO Q-Switches

Material Fused Silica Crystal quartzWavelength 1064 nm 1064 nm

Transmission(Single pass) ≥99.6% ≥99.6%

Damage Threshold ＞1GW/cm²@1064nm,10ns,10Hz ＞1GW/cm²@1064nm,10ns,10HzCondition through base plate ＜0.2% /Single side ＜0.2% /Single sidePolarization Random Linear,vertical to baseAperture 1-8mm 1-6 mmRF Frequency 27.12/40.68MHz 40.68/80MHz

RF power rating(Maximum)50 WCompressional

50 W100W Shear

RF connector BNC BNC

Thermal Security connector SMA,SMB,SMC SMA,SMB,SMC

Rise time(10~90%) 110 ns/mm 113 ns/mmDiffraction efficiency ＞60% ＞60%Input impedance 50 Ω 50ΩVSWR ＜1.2:1 (<1.4:1 50W Diffraction power) ＜1.2:1 (<1.4:1 50W Diffraction power)

Cooling materials 316stainless steel 316stainless steelWater flow rate ＞190 cc/min ＞190 cc/minOperating temperature 10~40 10~40

Storage temperature 0~50 0~50

A08(Frequency=27.12/40.68MHz)

Specifications

*Customized (wavelength, dimension, material, etc.) are available.*CASTECH provides the Product specification for specific models, please contact our company for more details.

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Dimensions(mm)

Conduction-Cooled AO Q-Switches

A01 (Frequency=40.68/80MHz)

Material Crystal Quartz Dense FlintWavelength 1030,1064,… nm 1047-1064,...nmTransmission(Single pass) ≥99.6% ≥97.0%

Damage Threshold ＞1GW/cm²@1064nm,10ns,10Hz ＞1GW/cm²@1064nm,10ns,10HzCondition through base plate ＜0.2% ＜0.2% Polarization Linear,vertical to base RandomAperture 0.5-3mm 0.5-2mmAcoustic mode Compressional CompressionalRF frequency 40.68/68/80 MHz,... 80/100/120MHz...

RF power rating(Maximum) 25W 5W

RF connector SMA,BNC,MMCX,… SMA,BNC,…

Rise time(10~90%) 113 ns/mm 177 ns/mmDiffraction efficiency ≥85% ≥50%VSWR ＜1.2:1 ＜1.2:1Cooling Conduction-cooled Conduction-cooledStorage temperature -20~70 -20~70

A02(Frequency=40.68/80MHz)

Specifications




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Product Introduction Acousto-optic modulators (AOM) can be used like a shutter (cycling light

on and off at a set frequency), or as a variable attenuator (controlling the

intensity of transmitted light dynamically). This product only exist 1st order

diffracted light under the interaction of Bragg diffraction.

According to the types of structure, CASTECH's acousto-optic modulators

can be divided into: free-space AOM and fiber-coupled AOM. CASTECH's

modulator optimizes the high laser Damage Threshold*. The acousto-optic

medium Damage Threshold* is ＞1GW/cm2. The form of connection of the

fiber-coupled AOM fiber termination can be adopted by the FC/PC or bare fiber,

it provides the aspects of requirements of rise time, modulation rate and

application power for process the matching. CASTECH can customize the

product according to customer needs.

AO Modulators

Product number Type RF(f)

Aperture(a)

Material(m)

Mode(t)

Wavelength(w)

Connector(c)

Housing(h)

CAOM-f-a-mt -w-c-h Free space

100 MHz120 MHz150 MHz200 MHz250 MHz

...

≤2 mm TE(TeO2)

C(Compressional)

1064nmSMASMC

…A13,...

Applications

Product list

Product number Type RF (f)

RF Range(r)

Power(p)

Material(m)

Fiber type(a)

Fiber terminal(t)

Wavelength(w)

Connector(c)

Housing(h)

CAFQ-f/r-p-mat-w-c-h Fiber-coupled

100 MHz120 MHz150 MHz200 MHz250 MHz

...

/ ≤2.5W TE(TeO2)

1(HI1060)

2(PM980)

3(PM 10/125)

...

B(Bare Fiber)

F(FC/PC)

1064nm...

SMA... A19,...

The schematic diagram of AO Modulator

l Laser marking

l Lithography

l Material processing

l Medical surgery

l Micromachining

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Free Space AO Modulators

Material TeO2

Wavelength 1064 nmTransmission(Single pass) ≥97%Damage Threshold* ＞1GW/cm²@1064nm,10ns,10HzDiffraction efficiency Nom ≥80%Polarization RandomClear Aperture 0.5,1,1.5,2,…mmAcoustic mode CompressionalDiffraction efficiency Bragg DiffractionRF frequency 100,120,150,250…MHzRF power rating(Maximum) ≤2.5 W RF connector SMA,SMC,…Rise-time/fall-time ＜120 nsInput impedance 50 ΩVSWR ＜1.2:1Operating Temperature Range 10~40

Storage Temperature Range 0~50

Specifications

Dimensions(mm)

A13




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Fiber-Coupled AO Modulators

Material TeO2

Wavelength 1064 nmAverage optical power handling 1 WPeak optical power handling 1 KWInsertion loss ≤ 4dBPolarization dependent loss ≥18 dBAcoustic mode CompressionalExtinction ratio ＞45 dBRise-time/fall-time: (10% - 90%) ≤10 nsRF frequency 200/250 MHzRF power rating(Maximum) 2.5 W RF connector SMAInput impedance 50 ΩVSWR ＜1.5:1Fiber type PM980、PM 10/125Fiber length 1.3 mFiber termination Bare Fiber、FC/APCStorage Temperature Range 0~50

Specifications

Dimensions(mm)

A19


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Product Introduction The Acousto-Optic Frequency Shifter (AOFS) with RF driver is used to

modify the frequency of the optical beam. Due to the Doppler shift, the frequency

shift of 1st order diffracted light (variation quantity of wavelength) equals to the

frequency of acoustic (wavelength) after the AO frequency shifters. If the incident

direction of acoustic wave and optical wave are the same, the laser frequency shifts

will be the positive value, anyway if the incident direction are opposite, the value

of the laser frequency shifts will be the negative value.

Applications such as interference-based optical techniques require a high

extinction ratio between the diffracted and undiffracted beam; This can be achieved

with a high-quality optical finish to minimize optical scatter.

CASTECH offers standard products with frequency shifts of 73 MHz. In

addition,CASTECH provides the services of customize for center frequency and

the value of frequency shifts.

Product list

Applications


l Interferometry

l Laser cooling

l Laser Doppler velocimetry

l Optical heterodyne detection

Product number Center frequency(f)

RF range(r)

Aperture(a)

Material(m)

Mode(t)

Wavelength(w)

RF connector(c)

Housing(h)

CAFS-f/r-a-mt-w-c-h

80MHz100MHz120MHz200MHz

...

/ ≤2mm TE(TeO2)

C(Compressional)

1064nm,... SMA A17,...



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Material TeO2

Wavelength 1064 nmTransmission(Single pass) ≥97%Damage Threshold* ＞1GW/cm²@1064nm,10ns,10HzDiffraction efficiency Nom ＞70%Polarization RandomClear Aperture 0.5,1,1.5,2,…mmAcoustic mode CompressionalOperating mode BraggDiffraction angle 18.5 mradRF Frequency 73 MHzRF Bandwidth 6 MHzRF power rating(Maximum) 2 W RF connector SMARise time ＜120 nsInput impedance 50 ΩVSWR ＜1.2:1Operating temperature 10~40

Specifications

Dimensions(mm)

A17


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Product Introduction Acousto-optic deflectors (AODF) are based on the deflection of light by a

propagating acoustic wave in an optical isotropic medium. Incident light is

deflected in one or more directions by periodic variations in the refractive index

produced by the propagating ultrasound wave. AODF offers precise angular control

of an optical beam using RF drive frequency tuning.

CASTECH's AODF uses TeO2 crystal as the acousto-optic medium. CASTECH

promised the high quality of crystal due to the advanced growth and polishing

process and it makes the deflectors exists the low insertion loss and high Damage

Threshold*. In the meanwhile, we provide full scan angle diffraction efficiency and

power flux consistency. CASTECH can customize the product of AODF according

to customer needs.

Product list

Applications

Acousto-optic Deflectors

l Laser display

l Precision Machining

Product number Center frequency(f)

RF range(r)

Aperture(a)

Material(m)

Mode(t)

Wavelength(w)

RF connector(c)

Housing(h)

CADF-f/r-a-mt-w-c-h 90 MHz... / ≤2mm TE(TeO2)

S(Shear)

1064 nm SMA A33



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Acousto-optic Deflectors

Material TeO2

Wavelength 1064 nmTransmission(Single pass) ≥97%Damage Threshold* ＞1GW/cm²@1064nm,10ns,10HzDiffraction efficiency Nom ＞80%

Input Polarization 0°to mounting plane Output Polarization 90°to mounting plane

Clear Aperture 0.5,1,1.5,2,…mmAcoustic mode ShearOperating mode BraggDiffraction angle 18.5 mradCenter Frequency 90 MHzRF Bandwidth 35 MHzRF power rating(Maximum) 2 W RF connector SMAInput impedance 50 ΩVSWR ＜2:1Operating temperature 10~40

Storage temperature 0~50

Specifications

Dimensions(mm)


A33

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Product Introduction RF driver is designed for Acousto-Optic Devices. It can outputs the RF power

signal of fixed or variable-frequency. Through different modulated signals it can

produce the same, opposite or specific waveform to satisfied the optical devices to

accomplish the functions in different applications.

CASTECH's TRF drive power can be used with Acousto-Optic Devices. The

radio frequency (RF) can be 27MHz, 40.68MHz, 68MHz, 80MH and other higher

frequencies, and the radio frequency (RF) power can reach 30W. The drive power

supply has a variety of operating modes, such as FPS, PPK, R05 and A05. In

addition, the product can be customized according to customer requirements.

RF Drivers

Product list

l Matching Acousto-Optic Devices

Applications

Product number Series(as)

RF(f)

Supply power(v)

Power(p)

Cooling(t)

Channel number

(b)

Mode(m)

function(e)

RF connector (c)

CARD-as-f-vpt-bme-c

FA(Fixed

frequency A)

27MHz

40.68MHz

68MHz

80MHz

... 15D

(15 VDC)

24D

(24 VDC)

28D

(28 VDC)

>20W

C

(Conduction-Cooled)

A

(Air-Cooled)

W

(Water-Cooled)

1

F(FPS)

P(PPK)

A(A05)

R(R05)

M(M05)

C(Common)

...

SMA-F SMA-M BNC-F BNC-MSMC-F SMC-M

FB(Fixed

frequency B)

27MHz

40.68MHz

68MHz

80MHz

100MHz

...

10W20W30W

1 F(FPS)

S(Analog)

FC(Fixed

frequency C)

40.68MHz

68MHz

80MHz

...

10W20W 1 F(FPS)

S(Analog)



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RF Drivers - FA Series

RF frequency 27、40.68、68、80MHz

Frequency stability +/-1 ppm/°C

Output power ≥ 20 W

Digital control 5V TTL

Analog control0-5 V / 10 kΩ

5V (maximum output power)

Rise-time/fall-time(10%-90%) < 35 ns

Trigger frequency 1Hz - 1MHz

Input/output impedance 50 Ω

Fixed pulse adjustable 1 - 20 us

FPS windows adjustable 20 - 300 us

Supply power15VDC / 24 VDC

< 3A

VSWR < 1.2/1

Extinction ratio > 50 dB

Mode FPS\PPK\A05\R05\M05

Operating temperature 10~55

Dimensions(mm)

Specifications

*Customized (dimension, RF frequency, Output power, etc.) are available.*CASTECH provides the Product specification for specific models, please contact our company for more details.

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Specifications

Dimensions(mm)


RF frequency 27、40.68、68、80MHz







Trigger frequency 1Hz – 1MHz



< 3AVSWR < 1.2/1

Extinction ratio > 40 dB

Mode FPS\Analog

Input/Output Interface DB9 / SMA


RF Drivers - FB Series



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Specifications

Dimensions(mm)


RF frequency 40.68、68、80MHz









< 3AVSWR < 1.5/1

Mode FPS\Analog

Input/Output Interface DB9 / SMA


RF Drivers - FC Series

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BBO Pockels Cells

KD*P Pockels Cells

Pockels Cells Drivers

01

02

03

Electro-Optic Devices


E-mail: [email protected] | www.castech.com 31

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Pockels cells is a devices that used the Pockels effect by apply the

voltage on electro-optic crystal to change the polarization of incident light.

The Pockels effect, which includes the transverse and longitudinal Pockels

effect. In the case of the transverse Pockels effect the direction of the light is

perpendicular to the direction of electric field, but under the longitudinal

Pockels effect, they are parallel to each other. BBO Pockels Cells created by

use the transverse Pockels effect, it can reduce the voltage by changing the

ratio of BBO's width to length. We offer BBO Pockels cells with different CA

and length to choose from. Due to the low piezoelectric response and high

Damage Threshold*s of BBO, CASTECH's BBO Pockels cells supported the

application environment at 1MHz.

CASTECH provides the BBO Pockels Cells that can be divided into two

types, which are single or dual crystal geometry. Moreover, we also provide

different types of products and customized services to meet customer needs.

Product list

Applications

BBO Pockels Cells

Product number Aperture(a)

Crystal length(l)

Crystal quantity(q)

Additional(b)

Wavelength(w)

BPC-a l q-b-w

≤12mm A(20mm)

B(25mm)

...

S(single)

D(double)

…

C(Ceramic)

W(Wave plate)

B(Brewster window)

A(Brewster window & wave plate)

N(Nothing)

…

1(1064nm)

2(1030nm)

3(532nm)

...

Fiber-coupledFC/PC

Bare fiber…

l High repetition rate Q-switching

l Machining ,marking

l High speed optical switch

l Beam chopper

l Cavity dumping

The schematic diagram of BBO Pockels Cells

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CASTECH®

BBO Pockels Cells - S Series

Dimensions(mm)

Specifications

Model BPC-3AS BPC-3BS BPC-4AS BPC-4BS BPC-5AS BPC-5BS BPC-6AS BPC-6BS

Aperture diameter,mm 2.6 3.6 4.6 5.6

Crystal size(W*H*L),mm 3*3*20 3*3*25 4*4*20 4*4*25 5*5*20 5*5*25 6*6*20 6*6*25

λ/4 voltage(@ 1064 nm), kV DC 3.5 2.8 4.9 3.9 5.9 4.7 7.3 5.8

Capacitance, pF ≤3

Optical transmission % ≥98

Contrast ratio ≥1000:1

Dimension, mm 25.4*35 25.4*40 25.4*35 25.4*40 25.4*35 25.4*40 25.4*35 25.4*40

Damage Threshold 10J/cm², at 1064 nm, 10 ns, 10 Hz

BBO Pockels Cells - S Series


BPC-XAS-C/W BPC-XAS-A/B

BPC-XBS-C/W BPC-XBS-A/B



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Specifications

Model BPC-3AD BPC-3BD BPC-4AD BPC-4BD BPC-5AD BPC-5BD BPC-6AD BPC-6BD

Aperture diameter,mm 2.6 3.6 4.6 5.6

Crystal size(W*H*L),mm 3*3*20 3*3*25 4*4*20 4*4*25 5*5*20 5*5*25 6*6*20 6*6*25

λ/4 voltage(@ 1064 nm), kV DC 1.8 1.4 2.5 2.0 3.0 2.4 3.7 2.9

Capacitance, pF ≤6

Optical transmission % ≥97

Contrast ratio ≥1000:1

Dimension, mm 25.4*57.7 25.4*67.7 25.4*57.7 25.4*67.7 25.4*57.7 25.4*67.7 25.4*57.7 25.4*67.7


BBO Pockels Cells - D Series


BPC-XAD-C/W BPC-XAD-A/B

BPC-XBD-A/BBPC-XBD-C/W

Dimensions(mm)

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Specifications

Model Insertion loss Contrast ratio Power Fiber type Vλ/4 @1064nm Repetition rate Capacity

BPC-LF

<1.5dB ＞25dB 500 mW1 W2 W...

HI1060PM980

...

375±10V

300kHz

≤8pF

<1dB ＞30dB 1100±10V ≤16pF

BBO Pockels Cells - L Series


Vλ/4 @1064nm=375V

Vλ/4 @1064nm=1100V

Dimensions(mm)



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Pockels Cells is an optical devices for use to changing the polarization

state of light, inside of this product that equipped with the electro-optic

crystals (e.g KD*P). If applied the voltage to the Pockels Cells, when the laser

passing through the Pockels Cells, it will change the polarization direction of

the emergent light. The Pockels Cells can be used as a fast electro-optics

switch when the Pockels Cells used with the polarization element.

CASTECH provides the complete KD*P Pockels Cells range for our

customers. According to the shapes, it can be classified into two different

types of Pockels Cells, which are cylindrical (series DPC-R) and the cubic

(series DPC-S). The electrode connection for the DRC-R series can be the

connection of wires or insert pin. In the meanwhile, CASTECH provides the

integrated pre-adjusted Brewster polarizer, wave plate or ceramic plate.

CASTECH provides the Pockels Cells are all exists the AR coats windows,

under the promised of high transmittance is to guarantee the performance and

increases the lifetime for this product.

Product list

KD*P Pockels Cells


Aperture(a)

Crystal quantity(q)

Connection(c)

Additional(b)

Wavelength(w)

DPC-R X X - X X - X R(Circular)

≤12mmS

(single)D

(double)…

P(Pin)

W(Wire)

…

C(Ceramic)

W(Wave plate)

B(Brewster window)

A(Brewster window & wave plate)

N(Nothing)

…

1(1064nm)

2(1030nm)

3(532nm)

...DPC-S X X - X X - X S

(Square)

≤12mm

≤8mm

Applications

l Q-switching

l Regenerative amplifier control

l Machining ,marking

l Cavity dumping

l Pulse Picker

l Optical power stabilizer

The schematic diagram of KD*P Pockels Cells

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Dimensions(mm)

Specifications

KD*P Pockels Cells


Model DPC-RNS-W DPC-RNS-PC DPC-RNS-PB DPC-SNS-P DPC-SND-P

Clear aperture,(mm) 8,10,12 8,10,12 8,10 8 8

Intrinsic Contrast Ratio(ICR) >2000:1 >2000:1 >1000:1 >2000:1 >2000:1

Voltage Contrast Ratio (VCR)

CP >1500:1 >1500:1 >800:1 >1500:1 >1500:1

PP >1000:1 >1000:1 >500:1 >1000:1 >1000:1

Optical transmission >98% >98% >97% >98% >97%

λ/4 voltage,kV <4.0 <4.0 <4.0 <4.0 <2.0

Capacitance, pF 3-8 3-8 3-6 3-6 5-8


DPC-RNS-PC

DPC-RNS-P

DPC-SNS-P

DPC-RNS-W

DPC-RNS-PB

DPC-SND-P



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Product Introduction Pockels Cells Driver is an electricity devices which applied with the

Pockels Cells, it has the internal integration consists of high voltage power

supply and drive circuit. When the internal of the Pockels Cells driver

generated the frequency signal or the external applied the frequency signal, it

will produce the high voltage signal of relative frequency. When the laser

passing through the Pockels Cells, the change of the polarization direction of

the light is due to the Pockels Cells Driver applied the voltage to the Pockels

Cells. CASTECH‘s Pockels Cells Driver is suitable for the KD*P Pockels

Cells which is under the conditions of low repetition frequency and the BBO

Pockels Cells which under the conditions of high repetition frequency as well

as the pulse picker.

CASTECH created Pockels Cells Driver which according to the waveform

of outputs mode can be classified into three categories: positive, negative, and

square. CASTECH provides the services of customized for special types of

Pockels Cells Driver which from the aspects of output voltage and shape

dimension for our customers.

Product list

Applications


Product number Mode(M)

Max. voltage(V)

Max. frequency(F)

Trigger mode(T)

Housing(H)

PCD-M V-F-T-H

P(Positive)

6(6 kV)

5(5 kV)

4(4 kV)

3(3 kV)...

1(1 kHz)

50(50 kHz)

100(100 kHz)

1000(1000 kHz)

...

F(External)

I(Internal&External)

N00N01N02…

N(Negative)

S(Square)

l BBO Pockels Cells

l KD*P Pockels Cells

l High speed optical switch

l Pulse Picker

l Optical power stabilizer

The schematic diagram of positive

The schematic diagram of negative

The schematic diagram of square

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Dimensions(mm)mm

Specifications



Model PCD-P4-100-T-H PCD-N4-100-T-H PCD-S3-100-T-H

Maximum high voltage pulse amplitude 4 kV 4 kV 3 kV

Polarity Positive Negative Square

HV pulse rise time <10ns ~1us <10ns

HV pulse fall time ~1us <10ns <10ns

Maximum HV pulse repetition rate 100kHz

Trigger mode INT/EXT

Input-output delay 70 to 300us /

External triggering pulse duration requirement >100ns >200ns

External triggering pulse amplitude requirement 3.3-5V (TTL)

External triggering pulse rise & fall requirement <10ns

HV pulse jitter <1ns

External powering requirements DC 24V 3A / AC 85～264 V

Radiator Water-cooled / Air-cooled

The common without screen

The common with screen The small with screen



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Fiber Collimators

F-Theta Lenses

Beam expanders

Attenuators04

03

02

01

Laser Application Devices


CASTECH®M

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Product Introduction Fiber collimator is a major passive device, it is a significant component

while forming laser devices such as isolators and circulators, this kind of

devices that made by precisely aligned of optical fiber tips and focusing lens.

It collimates beam from fiber, or couples collimated beams into fiber.

According to the output mode of Optical switches, it can be classified

into two categories: Non-expanded and expanded collimator.

Non-expanded collimator consists of fiber head and focusing lens, which

has simple structure, weightless and usually used in optical fiber laser systems

for beam collimate or coupling.

Expanded collimator consists of fiber head, a focusing lens, beam

expander, it has a small divergence angle and usually used in the large spot

output system.

CASTECH provides the Fiber collimator, which the wavelength can reach

from the 980nm~ 2000nm, that adopted high-quality lens and the optical

element, corporate with simple and reliable mechanical structure, the return

loss of the product can reach more than 50dB, it has the special features of

small divergence and long working distance, other contents can be customized

according to the needs of customers

l Isolators

l Optical Switches

l Optical Circulators

l Fiber laser

Fiber Collimators


Power(p)

Fiber type(f)

Wavelength(λ)

End Diameter(e)

Beam diameter(b)

Housing(h)

HPCOL-t-p-f-λ-e-b-h

N(Non-expanded)

≤500W

1(10/125SCF)

2(20/130DCF)

3(12/250DCF)

4(20/250DCF)

5(30/250DCF)

6(PM 980)

7(PM10/125SCF)

8(PM20/130DCF)

9(PM30/250DCF)

…

980nm1030nm1064nm

...


C(6mm Armoured Cable)

E(8mm Armoured Cable)

0.4(0.4 mm)

0.5(0.5 mm)

1(1 mm)

2(2 mm)

5(5 mm)

…　

A01,...

A02,QCS,...E(Expanded)

The structure diagram of collimator

Applications

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High Power Collimator

Non-expanded Expanded

Operating Wavelength 1030/1064nm,... 1030/1064nm,...

Wavelength range ±20nm ≥±20nm

Working distance 200mm or others 300mm or others

Working distance range ±10mm or others ±50mm or others


Fiber Type 20/130 or others 20/130 or others

Optical Power(Average) 5,10,20,30W or others 5,10,20,30W or others

Beam Diameter 0.5mm or others 5mm or others

Divergence 1.7mrad or others /

OperatingTemperature Range 10～50 10～50

Storage Temperature Range 10～70 10～70

A01(Non-expanded，Power≤30W) A02(Expanded，Power≤200W)


QCS

Dimensions(mm)

Specifications

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Product Introduction F-Theta lenses are commonly used in laser marking, engraving, and

cutting systems. The functions of F-Theta Lens is to provide a flat field for

the image plane which is in the scanning system. The scan radial image

height equals to focal length of the lens multiplied by the angle of the chief

ray makes in the object space. The formula as follow: 2y'=EFL×2θ×π

/180 where 2y' is the scan length or diagonal, EFL is the focal length of the

scan lens, 2θ is overall scan angle.

CASTECH provides the flat-field focusing lens that can be classified into

two categories: telecentric and non-telecentric. It combines the high-quality

optical lenses with precision mechanical structures. In the meanwhile, the

product has a standard threaded interface, which is compatible and easy to

assemble. Various parameters can be customized according to customer

requirements

l Laser Scanning

l Short Pulse Laser

l Ultrashort Pulse Laser

F-Theta Lenses

Product number Wavelength(A)

Focal distance(B)

Scan field(C)

FT-A-B-C 355nm...

109(109.4mm)

160(160mm)

174(174.1mm)

225(255mm)

...

63(63×63mm)

99(99×99mm)

107(107×107mm)

158(158×158mm)

...

Telecentric F-Theta Lenses Non-telecentric F-Theta Lenses

Advantage The shape of the central spot is consistent with that of the edge spot. the distortion of the spot is small. Low Cost, Practical

Disadvantage Large size, heavy The magnification will vary, and the difference between the center and the edge is large.

Applications

Product list



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F-Theta Lenses

*Customized (wavelength, dimension, efl, etc.) are available.*CASTECH provides the product specifications of specific models, please contact our company for more details.

Name F-Theta LensesMaterial Fused Silica

Wavelength (nm) 355，...

EFL(mm) 109.4，160，174.1，255

BFL(mm) 153.5，196.99，219.48，321.7Working Distance(mm) 151.5，194.43，216.48，319.7

Scan Angle (°) ±24.3，±25，±25.3，±25.5

Scan Length (mm) 91.8，140，151，224.8Scan Field(mm) 63×63，99×99，107×107，158×158

Entrance Beam Diameter(mm) 6，7，7，10m1 / m2 13 / 35.5，13 / 23，13 / 20，13 / 28

M2 to Mount Edge(mm) 26，15.87，13.72，21Image Spot Size (1 / e2)(um) 12，15，16，17

Diameter(mm) 121，90，90，107Total Length(mm) 88.5，55.7，51.98，60.5

Screw Thread M85×1Transmission >97%

Protective Window Yes

FT-355-109-63 ( telecentric ): FT-355-160-99:

FT-355-174-107: FT-355-255-158:

Dimensions(mm)

Specifications

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Tel:+86-(0)591-83710533 E-mail: [email protected] http://www.castech.com

Product Introduction Beam expander is an optical device which used to increase the diameter of

collimated input beam to larger collimated output beam. The Beam expander

primarily applied in such Laser scanning, laser cutting, interferometry, and

remote sensing. Usually, the beam expander consists of a negative and a

positive lens.

CASTECH provides the beam expander can be classified into two categories:

adjustable divergence angle and non-adjustable divergence angle. The product

has a variety of magnification and outside diameter, easy to install and integrate

and can satisfy various demands of our customers. The parameters can be

customized according to customer requirements. l Laser Scanning

l Short Pulse Laser

l Ultrashort Pulse Laser

Beam Expanders

Product number Wavelength(A)

Magnification(B)

Thread(C)

Wavelength(D)

Housing(H)

BE-A-B-C-D-H 355nm...

2(2X)

3(3X)

...

2(2M22*0.75)

3(3M30*1)

...

A(yes)

B(no)

G01G02...

Adjustable divergence angle Not adjustable divergence angle

Advantage Divergence angle can be adjusted to minimum Simple structure and low cost

Disadvantage Complex structure and high cost The divergence angle can not be fine-tuned to achieve the best effect.

Applications

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Beam Expanders

*Customized (wavelength, dimension, efl, etc.) are available.*CASTECH provides the product specifications of specific models, please contact our company for more details.

Name Laser Beam Expander

Material Fused Silica

Wavelength (nm) 355, …

Magnification 2,3,4,... 5,6,7,8,10,... 2,5,7.5,...

Clear Input Aperture(mm) 12, 8, 8 8 8

Clear Output Aperture (mm) 26, 26, 20 31 15

Max. Input Beam Diameter(mm) 10, 6, 4 6, 4, 4, 3, 3 2

Outside Diameter(mm) 42 46 120*30*25.4

Total Length(mm) 58 80 /

Screw Thread M22×0.75 or M30×1

Transmission >98%

Divergence Adjustable No or Yes


G01 G02

G03 G04

Dimensions(mm)

Specifications

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Product Introduction Optical attenuator is an optical device which can be used in continuously change

the output power of laser. The device consists of a wave plate (or an electro-optical

crystal) and a polarizer. The polarization of incident light is modulated by wave plate

(or an electro-optical crystal) and then incident on the polarizer. The polarizer will

divide the incident light into two beams, to accomplish the target of changing the

transmitted light power which is by changing the ratio of the two beams. Optical

attenuators are widely used in various fields such as the precision laser processing,

laser detection, sensing and others. They also have unique advantages in ultra-fast

and ultra-short pulse laser systems.

CASTECH provides the attenuator can be classified into two types: wave plate

modulation and electro-optic modulation. Wave plate modulation is to control the

ratio of P and s light through polarizer by controlling the rotation angle of 1/2 wave

plate. This kind of product has compact structure and strong adaptability. The

electro-optic modulation Attenuator 's maximum speed of the power regulation can

reach the nanoseconds, also it can be used as high speed light switches. The polarizer

of these two products can choose the polarization splitter prism or Brewster window.

In the meanwhile, there has the electric and manual control schemes can be selected.

Users can choose the appropriate product type according to the use requirements.

The product can also be matched with easy-to-disassemble optical traps for selective

use by customers.

l Laser Industrial Processing

l Laser Sensing System

l Ultrafast Laser System

Attenuators


Control(c)

Polarize(b)

Aperture(a)

Power(p)

Wavelength(λ)

Housing(h)

COA-tc-B-a-p-λ-h O

(Optical)

E(Electroptical)

A(Automatic)

M(Manual)

B(Brewster)

5,10,20,40mm,.. ≤10000W532,800,1030,

1064nm,...

P01, P02,...

COA-tc-P-a-p-λ-h

P(PBS)

5,10,12,25.4mm,.. ≤200W P04,...

Polarizer type PBS Brewster window

Advantage High extinction ratioP-light and S-light are perpendicular to each other

Large apertureHigh Damage Threshold*

Disadvantage relatively low Damage Threshold*Limited aperture P-light and S-light have a certain angle

Applications

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Optical Attenuators


Name Optical attenuator

Type Optical (half-wave plate )

Wavelength (nm) 1550,1064,1030,800,532,355,343,…

Damage Threshold* (10ns 10Hz@1064) 30J/cm² (Brewster polarizer) or 10J/cm² (PBS)

Average power Up to 5000W (Brewster polarizer ) / 500W (PBS)

Extinction Ratio(Tp : Ts) ＞1000 : 1

Attenuation range 0.3%-99%

Control mode Manual or Automatic

Polarizer Brewster window or PBS

Storage temperature 10～50

Storage humidity <50%RH

P01 P02 P03

Dimensions(mm)

Specifications

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Electro-Optic Attenuators


Name Optical attenuator

Type Electro-optic (crystal)

Wavelength (nm) 1550,1064,1030,800,532,355,343,…

Damage Threshold* (10ns 10Hz@1064) 20J/cm² (Brewster polarizer) or 10J/cm² (PBS)

Average power Up to 1000W (Brewster polarizer ) / 500W (PBS)

Extinction Ratio(Tp : Ts) ＞1000 : 1

Attenuation range 0.3%-98%

Control mode Automatic

Polarizer Brewster window or PBS

Operating Temperature 10～35

Storage humidity <50%RH

P04

Specifications

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Date post:	21-Mar-2020
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