Thong Tin Quang

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    22-Dec-2015
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Thong Tin Quang

Transcript of Thong Tin Quang

BI THUYT TRNH

MNG VIN THNG & TH TRNG IN TRONG THY IN

BI THUYT TRNH

TI

LOGONi dungKin trc mng vin thng.II Mng cp quang.IKin trc mng o m.IIIKhc phc s c trong h thng.IVGii thiu mng thng tin quang.IS dng nh sng truyn tn hiu trn ng truyn.- Dng cp quang dn nh sng.u im:- Bng thng rng.- Truyn c xa vi suy hao thp.Nhc im:- X l phc tp v cha c b nh quang hc - Gi thnh cao

Mng thng tin quangH thng truyn dn thng tin quang

Cp quangKhi nim:- Cp quangl mt loi cp vin thng lm bng thy tinh hoc nha, s dng nh sng truyn tn hiu.Cu to:- Cp quang c cu to gm dy dn trung tm l si thy tinh hoc plastic c tinh ch nhm cho php truyn i ti a cc tn hiu nh sng. - Si quang c trng mt lp lt nhm phn chiu tt cc tn hiu nh sng v hn ch s gy gp ca si cp quang.

Cp quangCp quang gm cc phn sau:

Cp quangc im- Pht: Mtit pht sng (LED) hoclaser truyn d liu xung nh sng vo cp quang.- Nhn: s dng cm ng quang chuyn xung nh sng ngc thnh data.- Cp quang ch truyn sng nh sng (khng truyn tn hiu in) nn nhanh, khng b nhiu v b nghe trm.- suy dn thp hn cc loi cp ng nn c th ti cc tn hiu i xa hng ngn km.- Ci t i hi phi c chuyn mn nht nh- Cp quang v cc thit b i km rt t tin so vi cc loi cp ng

Cp quangwww.themegallery.com

M mu ca ng mng m 1: Xanh dng ng m 2: Mu camng m 3: Xanh lc ng m 3: Mu nung m 4: Mu xm ng m 5: Mu trng

M mu ca si quangSi quang 1: DngSi quang 2: CamSi quang 3: LcSi quang 4: NuSi quang 5: XmSi quang 6: TrngSi quang 7: Si quang 8: enSi quang 9: VngSi quang 10: TmSi quang 11: Hng Si quang12: Lamwww.themegallery.comQuy trnh hn cp quangCch hn ni cp quang gm 4 bc c bn sau.Bc 1: chun b si quangB tt c cc lp ch cn cha li hai lp c bn ca si quang lp li (Core) v lp bc (clading)K tip l lau sch bng alcohol 90oYu cu phi t c sch caoBc 2: Ct si quangThc hin vt ct thngYu cu vt ct l: Ct thng vung gc vi trc ca si quang, khng m, khng li mp, khng dnh biBc 3: Hn si quanga 2 si cn hn vo my hn quang.Yu cu 2 si quang thng trc, mi hn tt khng suy hao ( suy hao cho php t 0.00 n 0.05 dBm ) Bc 4: C nh mi hnC nh mi hn trnh trng hp gy.Yu cu ng nung phi phng khng cong vnh, nha nung trong sut, che ph ton b mi hn l t.

www.themegallery.comMulti-mode (c)- Truyn nhiu tia sng.- Li ln ngun sng r.- Nhiu gia cc ch truyn.- Sinh li tn hiu sau mi 10km- Tc 32-140 Mbps.Single-mode (mi)- Truyn mt tia sng.- Li nh mt tia, ngun sng t tin.- Loi b nhiu.- Sinh li tn hiu sau mi 40km- Tc vo trm Mbps Phn loi cp quang.

Cc ch truyn

Truyn nh sng trong cp quang

Multimode step-index

Multimode graded-index

Single modeCc loi connector

S pht trin ca h thng cp truyn

www.themegallery.comKin trc mng vin thng.IICm n lng nghe !!LOGO