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Chuyn 6: H THNG TRUYN DN SOLITON ti: H thng truyn dn v thit k h
thngtruyn dn Soliton
Ging vin hng dn
: Th.s Trng Xun Trung
Sinh vin thc hin : Nhm 12 - L11CQVT09 -NNguyn Qunh HuL Xun T
Nng- 4/2013
BO COCHUYN THNG TIN QUANG
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H THNG TRUYN DN V THIT K H THNGTRUYN DN SOLITON
NI DUNG TRNH BY:
GII THIU TNG QUAN V SOLITON.
H THNG TRUYN DN SOLITON.
HIT K H THNG SOLITON.
KT LUN.
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TNG QUAN V SOLITON
Khi nim Soliton:
Soliton l thut ngbiu din cc xung lan truyn quakhong cch di m
khng thay i hnh dng xung do n ara khnngcbittruyn cc xung khng
nhycmvitn sc.
Soliton siStntica soliton si l ktqucas cnbnggia
tn scvntc nhm GVD v tiuch pha SPM.
C hai uhnchhiunngtruyn thng quang si khi
hotngclp trn xung quang ang lan truyn bn trongsingoitr khi
xungbdch ban u theo nghng.
Phn loi Soliton: - Soliton c bn v soliton bc cao
- Tin trnh Soliton
- Soliton ti (Dark soliton)
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H THNG TRUYN DN SOLITON
Mhnh h thng chung:
- My pht quang l mt diode laseriuch cc xung quangtrctip.
- Knh truyndn l cc onsi quang n mode.- B thu quang bao gmmt
photodiode.
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Truyn thng tin vi cc soliton:ngi ta s dng m RZ m ha thng tin
trong truyn dn soliton.
Dy bit soliton m RZ. Mi soliton chim mt phn nh ca khe bit sao
chocc soliton ln cn c t xa nhau.
H THNG TRUYN DN SOLITON
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Tng tc Soliton: Tng tc soliton khng chph thucvo khong cch 2q0
gia cc soliton ln cn m cn phthuc vo pha v bin tngica 2 soliton.
Tin trnh mt cp soliton qua 90 ln chiu di tn sc c s tng tc
soliton vi khong cch bc ban u q0=3.5 trong tt c bn trng hp.
H THNG TRUYN DN SOLITON
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S lch tn:
- lan truynnhmt soliton cbn bn trong si quang,xung u vo khng ch
c dngsech m cnphi khngbchirp.
- Trong thct, cc ngun xung quang ngnu c slchtn
(bchirp) tc ng ln chng. iu ny lm dao ng cnbng chnh xc gia GVD v
SPM.
My pht soliton:- H thng truyn thng soliton quang yu cu mt
ngunquang c khnng to cc xung pico giy khng chirp tclp cao.
- Ngun pht c thvn hnh bc sng gn 1,55 , tisuy hao si l nh nht v
cc b khuych i quang si
EDFA c thhotngmt cch hiuqu b suy hao si.
H THNG TRUYN DN SOLITON
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nh hng ca suy hao si:
- Cc soliton sdng tnh phi tuynsi duy tr rngca chng ngay c khi c
tn scsi. Tuy nhin thuc tnh nychng khi suy hao l khng ngk.
- Khi suy hao ln, cng sutnhgimngk v s lmsuy yu cc hiu ng phi
tuyn cn thit chng li nhhngca GVD, dnnsmrng xung soliton.
Khuch i Soliton:
S khuych i tp trung:(a) v khuych i phn tn .
(b) b suy hao si trong h thng
truyn dn soliton.
H THNG TRUYN DN SOLITON
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C ch Soliton trung bnh:
Tin trnh soliton trong c ch soliton trung bnh qua khong
cch10000kmvi LA=50km, a=0,22dB/km v v a) LD=200km, b)LD=25km.
THIT K H THNG SOLITON
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Tin trnh thc nghim:
Th nghim thit lp truyn dn soliton 2 b EDFA t sau b iu chLiNO3hot
ng nh mt b tng th cng sut.
THIT K H THNG SOLITON
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Tin trnh thc nghim:
Cu hnh vng lp tun hon truyn dn qua 12000km tc 2,5Gb/s.- Trong th
nghim ny, BL=30(Tb/s)km, b gii hn
chnh bi jitter timing cm ng b khuych i.
- Cc soliton qun l tn sc c th to ra mt s li ch
cho h thng truyn dn soliton, chng hn nh ci thin t stn hi u trn
nhiu im itter timin .
THIT K H THNG SOLITON
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Cc Soliton hnh thnh ts cn bnggia GVD v SPM c
khnng duy tr rng xung qua khong cch lan truynln. Soliton cbn c
xung u vobdch pha trong qu trnh lan
truyn trong sinhng bin khng i lm cho n trnnl tngvitruyn thng
quang.
C khnngnnhchnglisnhiulon. Sdng ccbkhuchi quang si EDFA c
nhiuuim
lm cho mchngindlpt.
C khnngkthpnhiu knh c ccbc sng khc nhautrong mtsin mode tng dung
lng v tctruyndn.
Vnv jitter
Nhiu kh khn trong vntrin khai hthng solitontrong thct.
KT LUN
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XIN CM N THY GIO V CCBN THEO DI BI BO CO !
THE END
QUNH HU XUN T
