KHUKHUCH CH I EDFA & RAMANI EDFA & RAMAN

Gv: TrGv: Trn Nhn Nht Kht Khi Hoi HonnBB mn i mn in tn t ViVin thngn thngKhoa Cng nghKhoa Cng nghTrTrng ng i hi hc Cc Cn Thn ThEmailEmail: tnkhoan@ctu.edu.vn: tnkhoan@ctu.edu.vn

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NNI DUNGI DUNG

1. Gii thiu Tng quan2. Khuch i EDFA3. Khuch i RAMAN

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GiGii thii thiu tu tng quanng quan

Phng php khuch i c

Ngun: K thut thng tin quang 2 Vn Vit Em HV CN BCVT

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GiGii thii thiu tu tng quanng quan

Phn chia bng sng

Ngun: K thut thng tin quang 2 Vn Vit Em HV CN BCVT

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GiGii thii thiu tu tng quanng quan

Nguyn tc khuch i quang

Ngun: K thut thng tin quang 2 Vn Vit Em HV CN BCVT

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GiGii thii thiu tu tng quanng quanM hnh tng qut B khuch i quang

Ngun: K thut thng tin quang 2 Vn Vit Em HV CN BCVT

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GiGii thii thiu tu tng quanng quan

Khuch i quang si OFA (Optical Fiber Amplifier)

Vng tch cc l si quang c pha t him. Do , OFA cn c gi l DFA (Doped-Fiber Amplifier)

Vng bc sng c khuch i thay i tu theo loi t him pha vo si quang:

+ EDFA (Erbium-Doped Fiber Amplifier): 1530nm 1565nm+ PDFA (Praseodymium-Doped Fiber Amplifier): 1280nm 1340nm + TDFA (Thulium-Doped Fiber Amplifier): 1440nm -1520nm + NDFA (Neodymium-Doped Fiber Amplifier): 900nm, 1065nm

hoc 1400nmNgun: K thut thng tin quang 2 Vn Vit Em HV CN BCVT

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Mt s thng s k thut ca b khuch i- li Gain (khong 20dB): G = Pout Pin ; G (dB) = Pout Pin - Bng thng khuch i: Tnh n im li gim -3dB so vi

li nh- Cng sut ng ra bo ho- H s nhiu (NF: Noise Figure)

GiGii thii thiu tu tng quanng quan

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GiGii thii thiu tu tng quanng quanCng suCng sut ng ra bt ng ra bo hoo ho (Saturation Output Power)(Saturation Output Power)

Ngun: K thut thng tin quang 2 Vn Vit Em HV CN BCVT

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GiGii thii thiu tu tng quanng quanHH ss nhinhiu NF : Noise Figureu NF : Noise Figure

Ngun nhiu chnh l do pht x t pht (Spontaneous Emission) pha & hng ngu nhin

Gy nhiu pha v bin nu hng truyn gn vi tn hiu Nhiu ny cng c khuch i ng ra - ASE (Amplified

Spontaneous Emission)

Pout = G.Pin + PASE

Lm gim SNR ng ra, o bng h s NF: NF thng t 3dB n 5dBNgun: K thut thng tin quang 2 Vn Vit Em HV CN BCVT

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EDFA ErbiumEDFA Erbium--Doped Fiber Amplifier Doped Fiber Amplifier

S S nguyn tnguyn tcc

Ngun: K thut thng tin quang 2 Vn Vit Em HV CN BCVT

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EDFA ErbiumEDFA Erbium--Doped Fiber Amplifier Doped Fiber Amplifier

HHnh EDFA thnh EDFA thc tc t

Ngun: K thut thng tin quang 2 Vn Vit Em HV CN BCVT

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NGUYN TNGUYN TC HOC HOT T NG EDFANG EDFA Thi gian sng ca Ion Er3+ trong

vng gi bn khong 10ms rng vng gi bn cho php khuch

i 1530nm - 1565nm (Band C L)

Ngun: K thut thng tin quang 2 Vn Vit Em HV CN BCVT

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SS DDNG EDFANG EDFA

Ngun: K thut thng tin quang 2 Vn Vit Em HV CN BCVT

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KHUKHUCH CH I RAMAN I RAMAN Da trn tn x kch thch RAMAN (Stimulated Raman

Scattering)

Nguyn tc: Mt e hp thu nng lng ca 1 photon sau pht ra mt photon c nng lng khc

Ngun: K thut thng tin quang 2 Vn Vit Em HV CN BCVT

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CCU TRU TRC KHUC KHUCH CH I RAMAN I RAMAN

Ngun: K thut thng tin quang 2 Vn Vit Em HV CN BCVT

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BNG TBNG TN & HN & H SS KHUKHUCH CH II

Ngun: K thut thng tin quang 2 Vn Vit Em HV CN BCVT

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TNG TNG RRNG BNG TNG BNG TNN

Ngun: K thut thng tin quang 2 Vn Vit Em HV CN BCVT

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RAMAN GAINRAMAN GAIN

Tham kho: Govind P.Agrawal, Fiber Optics Communication Systems, Third Edition, 2002 P250

CM N!