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IV International Workshop on Trends in Optical Technologies
28/05/2015
Strategies for Flexible Optical Transceivers
Jacklyn D. Reis, PhDCPqD, Division of Optical Technologies, Campinas – SP, Brazil
Division of Optical Technologies at CPqD
Technological TrendsTechnological Trends
Transmission and NetworksTransmission and Networks
Product Technologies
Product Technologies MicroelectronicsMicroelectronics Integrated
PhotonicsIntegrated Photonics
TransmissionTransmission
DSPDSP
AccessAccess
AmplificationAmplification
ROADMROADM
NetworksNetworks
HardwareHardware
SoftwareSoftware
FirmwareFirmware
TestsTests
MechanicsMechanics
RequirementsRequirements
Front EndFront End
Back EndBack End
DesignDesign
AlignmentAlignment
PackagingPackaging
SystemsSystems
SYSTEMS
DEVICESTransportTransport
Optical transmission team
Team Supporters/Partners
1 – Andrea Chiuchiarelli2 – Daniel Moutinho Pataca3 – Eduardo de Souza Rosa4 – Fábio Donati Simões5 – Flávio de Andrade Silva6 – Gabriel Suzigan7 – Glauco César C. Pereira Simões8 – Júlio Cesar Medeiros Diniz9 – Sandro Marcelo Rossi10 – Stenio Magalhães Ranzini11 – Tatiani Piven12 – Tiago Carneiro de Lima13 – Valery Nobl Rozental14 – Victor Emanuel Saraiva Parahyba
Optical Fiber Networks• The backbone of any network infrastructure worldwide• Optical line interfaces• Transceiver• Optical transport system• Optical channel
P.J. Winzer, “Scaling Optical Fiber Networks: Challenges and Solutions”, Optics&Photonics News, March 2015.
Outline
• Flexible Transceiver• Transmitter DSP
• Spectrally-Sliced Receivers
• Receiver DSP
• 400G Superchannel transmission
• NL fiber channel compensation
Synchronous Rate / Bandwidth Switching
• Digital Interpolator Filter
V.N. Rozental et al, “Synchronous Rate and Bandwidth Switching for Flexible Optical Transceivers”.
• Flexible Tx
Experimental DemonstrationV.N. Rozental et al, “Synchronous Rate and Bandwidth Switching for Flexible Optical Transceivers”.
• Several receiver optical front-ends with narrower bandwidth balanced detectors and TIAs
• Several ADCs with slower sampling rate, lower bandwidth, but enhanced ENOB;
BW
(i) Arbitrary signalat the Virtualized Rx input
BW1 BW2 BWn(ii) Digital signal after each ADC stage
~BW(iii) DSP is applied to reconstruct the original signal
Spectrally-Sliced Coherent RxSpectrally-Sliced Coherent Rx
λ1, 2, …, n
MUX
ADC
ADC
ADC
ADC
ADC
ADC
I
Q
CoherentReceiver
(1)
I
Q
CoherentReceiver
(2)
I
Q
CoherentReceiver
(n)
λ1
λ2
λn
Receiver Controller
D
S
P
BWBWBWBW1
BW2
BWn
BW
BW
BW
Spectrally-Sliced Receiver
Experimental Demonstration
• Flexible Rx Single-Carrier 200G – QPSK
CPqD Proprietary & Confidential – All rights reserved
J.C.M. Diniz et al, “Digital Signal Processing for Spectrally-Sliced Coherent Optical Receivers”.
Optical 400G Superchannels
• 2x31.5 GBd – PDM – 16QAM• 3x21 GBd – PDM – 16QAM• Maximum Transmission Distance with Inter-Sub-Carrier NL Post-
Compensation
Experimental Demonstration
• 5x400G Nyquist WDM Transmission 75 GHz Grid• 63 GSa/s (14 GHz) DACs• 5x50 km – 0.16 dB, 21 ps/nm/km, 112 um2
• 80 GSa/s (35 GHz) ADCs• Digital Back-Propagation• Coupled Equations DBP• Total Field DBP
F.P. Guiomar et al, “Ultra-Long-Haul 400G Superchannel Transmission with Multi-Carrier Nonlinear Equalization”.
Experimental Demonstration
Ultra-Long-Haul Transmission
F.P. Guiomar et al, “Ultra-Long-Haul 400G Superchannel Transmission with Multi-Carrier Nonlinear Equalization”.
ASIC Physical Implementation
28 nm HP TSMC
16 nm FF+ TSMC
Difference (%)
Latency 69 clocks 32 clocks -53.6
Placeable Instances
4.54 M 2.85 M -37.1
Logic Synthesis
Area5.82 mm² 1.88 mm² -67.7
Core Area (P&R)
8.31 mm² 2.68 mm² -67.7
Estimated Catapult®
Area 9.10 mm² 2.86 mm² -68.5
Estimated DC Power
2.256 W 1.146 W -49.2
S.M. Ranzini et al, “Deep Submicron Multimillion Gates Implementation of Fiber-Optic Nonlinear Equalizer using High Level Synthesis”.
ASIC View after P&RS.M. Ranzini et al, “Deep Submicron Multimillion Gates Implementation of Fiber-Optic Nonlinear Equalizer using High Level Synthesis”.
Final Remarks
• Digital Signal Processing
• Multiplexing Techniques
• Optical Transmission Technologies
• What is next?• More Capacity?• More Flexibility?• Magical devices