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5/19/2018 Khuech dai Raman.ppt
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Hc vin Cng Ngh Bu ChnhVin Thng
N TT NGHIP I HC ti:
Khuch i Raman trong h thngthng tin quang
Gio vin hngdn: ThS. Nguyn Th Thu NgaSinh vin thchin: Vng Thnh NamLp: D2004VT1
H Ni 12-2008
5/19/2018 Khuech dai Raman.ppt
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NIDUNG N
1. Gii thiu v khuch i quang
2. B khuch i Raman3. ng dng ca khuch i Raman
4. Kt lun
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1. Gii thiu v khuch i
quangNguyn l khuch i quang
Cc tham s khuch i quangng dng ca khuch i quang
5/19/2018 Khuech dai Raman.ppt
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Nguyn l khuch i quang
Da trn hintng pht x kch
thch v khng cc cng hngtrong khuchi
5/19/2018 Khuech dai Raman.ppt
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Cc tham s khuch i quang
khuch i:
Bng thng li:
H s nhiu:
2
1
2 Tv
g
g
in
out
P
PG
out
in
SNRSNRNF
5/19/2018 Khuech dai Raman.ppt
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ng dng khuch i quang
5/19/2018 Khuech dai Raman.ppt
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2. B khuch i Raman
Tn x Raman
Nguyn l b khuch i Raman
Bm v phng trnh tn hiu
Ngun nhiu trong b khuch i Raman
Phn loi
5/19/2018 Khuech dai Raman.ppt
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Tn x Raman
Trng thi kch thch
Trng thi u
Trng thi cui
Photon tn x
a)Tn x Stoke
Photon tn x
Trng thi cui
Trng thi u
Trng thi kch thch
a)Tn x phn Stoke
Nng lng
Tn x Stoke:Tn x phn Stoke:
12
12
5/19/2018 Khuech dai Raman.ppt
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Nguyn l b khuch i Raman
f bm = (E3 E1)/h
f khuch i = (E2 E1)/h
Mc nng lng chuyn (Transition state)
E3
Laser bmTn hiu cnkhuch i
Tn hiu ckhuch i
E
E 1
2 Mc nng lng dao ng (vibration state)
Mc nng lng nn (ground state)
5/19/2018 Khuech dai Raman.ppt
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Bm v phng trnh tn hiu
Tn ti qua mt bng tnrng (ln n 40THz)
Ph thuc phn cc:Gn nh trit tiu khi bmv tn hin phn cc vunggc
Ph khuch i:
5/19/2018 Khuech dai Raman.ppt
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Bm v phng trnh tn hiu
Khuch i Raman n bm
Cng sut bm:Vi bm thun:
Vi bm nghch:Cng sut tn hiu khuch i:
khuch i tn hiu:
)exp()( 0 zPzP pp
)](exp[)( 0 zLPzP pp
)0()()exp()0()( 0 sseffRss PLGLLPgPLP
z
spR
s
s zdzzPgP
zPzG
0)(exp
)0(
)()(
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Bm v phng trnh tn hiu
S dng nhiu laser
bm ti cc bcsng khc nhau
Ph khuch i
rng v tng ibng phng
Khuch i Raman abm:
5/19/2018 Khuech dai Raman.ppt
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Ngun nhiu trong b khuch i Raman
Nhiu tn x Rayleigh kp DRS:
Nhiu do thi gian sng ca electron ti trng thi kch thchngnNhiu pht x t pht ASE
Nhiu do bc sng nh sng bm v nh sng tn hiu gnnhau
Tng ng vi 2 hin tng tn x n: Mt tnx phn x v mt tn x tiKhuch i t pht (ASE) truyn trong hng nghchs c phn x li trong hng thun nh DRS
5/19/2018 Khuech dai Raman.ppt
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Phn loi
Khuch i Raman phn b
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3. ng dng b khuch i Raman
ng dng trong h thng WDM
ng dng vo thit b khuch i quangOPTera Long Haul 1600
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ng dng trong h thng WDM
Khuch i Raman l nn tng cho khuch i cngsut ti c ly di v cc di hot ng ti cc bngtn rng.
Tchbngquang
Ghpbngquang
Khuych i quang bng S
Khuych i quang bng C
Khuych i quang bng L
DRA
Laser bm nhiu
bc sng
Khuch i quang trong h thng DWDM a bng
5/19/2018 Khuech dai Raman.ppt
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ng dng vo thit b khuch i quangOPTera Long Haul 1600
Cc b khuch iRaman DraA vDraB.
tng c c lytruyn dn phathu ngi ta lpthm cc b khuchi Raman. l
cc card DRA.
DRA-B
OUT
(DRA-A)
MON-L
UPG
(DRA-B)
MON-C
DROP OUT
Internal tap
coupler
WDM
coupler
WDM
coupler
Raman AmplifierDRA-A
To Dual Ampli fier To Fiber plant
Connector
Raman Amplifier
S khi card khuch i Raman
5/19/2018 Khuech dai Raman.ppt
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4. Kt lun
Gii thiu chung v khuch i quang
B khuch i Raman
ng dng ca b khuch i Raman
5/19/2018 Khuech dai Raman.ppt
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Em xin chn thnh
cmn!