Nhóm 10 CHUYỂN MẠCH QUANG

7/28/2019 Nhm 10 CHUYN MCH QUANG

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CHUYN MCH QUANGGVHD : ThS.V NGC CHM

NHM 10: Phm Vn t

Nghim Xun HngNguyn Tin Thong

Phan Hong Linh

BI THUYT TRNH

TI

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I Gii thiu

chuyn

mchquang

II Kin trc

chuyn

mchquangMEMS

III Kt lun

Ni Dung

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Gii thiu

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S pht trin nhanh chng ca cc dch v mng bng

rng l ng lc thc y s pht trin ca mngquang th h k tip da trn nn tng cc cng nghghp knh phn chia bc sng (xWDM).

Trong tin trnh quang ha mng truyn thng, cc

ni cho quang OXC (Optical Cross-connects) vichc nng chuyn mch tuyn quang l cng nghquan trng ct li cho php tng cng kh nng png ca mng vi cc bin ng lu lng v ti u

cu hnh mng.

Gii thiu

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Trn thc t, hu ht cc OXC hin nay ang sdng li chuyn mch in v cc chuyn iquang-in/in-quang (OE/EO) giao din vov ra ca trng chuyn mch.

Khi nhu cu tc d liu tng cao, do cc hnch v tc x l trong min in, cc OXCny tr ln cng knh, phc tp, hn ch vdung lng, tiu th ngun ln v gi thnh t

.

Gii thiu

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=> V vy, nhm p ng kh nng nng cp tc d liu v trin khai cc giao thc mi trong

tng lai, cc OXC ton quang s dn thay th chocc OXC vi li chuyn mch in. Cc OXC ton quang ng dng chuyn mch

trong min quang vi kh nng nh

tuyn/chuyn mch tn hiu d liu quang mkhng cn n cc chuyn i OE/EO, do ,cho php chuyn mch c lp vi tc dliu v giao thc d liu vi tin cy cao, t

tiu tn ngun.

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Trong s cc cng ngh chuyn mch quangang c quan tm nghin cu v pht trin

ng dng nhm hin thc ha cc OXC tonquang, cng ngh chuyn mch quang MEMS,ni ln l cng ngh hng uv kh dng nhtv phng din thng mi thi im hin ti.

Cng ngh chuyn mch quang MEMS chophp thc hin chuyn mchc lp vi bcsng vi s lng cng vo/ra t c ln hn

nhiu so vi cc cng ngh khc.

Gii thiu

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MEMS vit tt ca t Micro-ElectroMechanical

Systems c ngha l h thng vi c in. Chngc kch thc micro.

Thit b MEMS l mt mch tch hp cc cutrc vi c kh,cc b cm bin vi cc phn t

in t v s dng lc truyn ng tnh in, ttrng hoc nhit dch chuyn v iu khincc phn t thnh phn theo yu cu.

Kin trc chuyn mch MEMS

1. Gii thiu

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1. Gii thiu

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V nguyn l, cc h thng chuyn mchquang MEMS c th phn thnh hai loi khcnhau theo c ch iu khin sng nh sng lchuyn mch quang s dng c ch phn x

hoc khc x v chuyn mch quang s dng cch nhiu x hoc giao thoa.


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Trong loi th nht, cc thit b thc hin chc nng

chuyn mch bng cch iu khin mt hochng truyn dn ca lung nh sng thng qua cccu trc phn x hoc khc x.

i vi loi th hai, chc nng chuyn mch hay

iu khin hng c thc hin nh vo cc hiung nhiu x hoc giao thoa trong s dng ccchuyn ng c hciu chnh pha ca nhsng.


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Trong h thng chuyn mch quang MEMSiu chnh hng i ca lung nh sng(c th

bao gm mt bc sng hay mt nhm cc bcsng) theo hng yu cu bng c ch phn x

thng qua cc phn t chuyn mch l ccgng kch thcrtnh (vi gng).


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Cch thc t chc phi ghp cc vi gng trongtrng chuyn mch l yu t quyt nhncc c tnh ca mi trng chuyn mchquang MEMS.


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Cu trc h thng CM quang MEMS bao gm

cc phn t chuyn mch quang l cc vi gngv cc thu knh/cch tc kh nngiuchnh hng i ca lung sng t u vo nu ra yu cu ca trng chuyn mch.

c tnh ca cc vi gng ph thuc vo chtliu ch to gng: silic a tinh th (polysilicon)hoc silic n tinh th.


2. Cu to

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Vi gng c th c iu khin theo c ch shoc tng t nh minh ha trong hnhv:


2. Cu to

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Trong cc h thng chuyn mch quang MEMS s

dng c ch iu khin s, cc phn t vi gng c c nh hngv v tr vi gng ch mttrong hai trng thi: bt (ON-chn vo ng i calung sng) hoc tt (OFF-khng tc ng n

lung sng) => d dng iu khin. Mi u vochuyn mch yu cu mt dy N vi gng nghing450so vi hng nh sng vo trng chuyn mchtng ng vi N u ra chuyn mch.


2. Cu to

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i vi cc h thng s dng c ch iu khin

tng t, cc phn t vi gng c khnngiu chnhc gc nghingso vihng nh sng ti v cc vi gng ny c

t c nhtrn ng di chuyn ca lungsng.


2. Cu to

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i vi cc h thng s dng c ch iu khin

tng t, cc phn t vi gng c khnngiu chnhc gc nghingso vihng nh sng ti v cc vi gng ny ct c nhtrn ng di chuyn ca lungsng.


2. Cu to

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3.

Ph

n

Loi Chuyn mch quang MEMS mt chiu

Chuyn mch quang MEMS hai chiu

Chuyn mch quang MEMS ba chiu

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Chuyn mch quang MEMS 1chiu

Kin trc cbn ca mttrng

chuynmch quangMEMS mtchiuc

minh hatronghnh bn:

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Hot ng: Lung nh sng cn chuyn mch ri

mng si quang u vo c chun trc bng hthng thu knhhng n phn t tn sc. Tnhiu DWDM u vo n phn t tn sc (cch t)s c phn tch thnh cc bc sng thnh phn.Mi bc sng sau c truyn n mt vi

gng MEMS tng ng c iu chnhhng phn x ph hp nhm n c si quangu ra theo yu cu v c kt hp vi cc bcsng khc thng qua phn t tn sc.


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NX: Kch thc ca trng chuyn mch tl tuyn tnh vi s lng knh bc sngquang. iu ny gip gim kch thc thitb, gi thnh v cng sut tiu th so vi cc

cng ngh chuyn mch ng dng MEMSkhc.


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Mt mng hai chiu ca cc vi gngchuyn mch sp xp theo cu hnh ngangdc c dng nh hng nh sngt cc si quang u vo n cc si quang

u ra tng ng ca trng chuyn mch:

Chuyn mch quang MEMS 2 chiu

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u im cakin trc chuyn mchquang MEMS hai chiu l vi gngchc hai trng thi (ng hoc m), iu nyngha l trng thi ca vi gng c iu

khin dng logic s nn vic iu khin l rtd dng.


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Hot ng:Trong trng chuyn

mch quang MEMS hai chiu, lung sng chuynmch c chun trcv truyn song song vi mtphng nn ca mng vi gng. Khi kch hot mtgng nm trn hng tng ng vi u vo calung sng, n chuyn ng ct vo ng i ca nhsng v nh hng nh sng n u ra tng ngvi ct cha vi gng, khi vi gng to mt gc450so vi hng n ca lung sng.B add & drop thm hoc bt knh quang.


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Chuyn ng ca gng v nh matrix 16x16 256 vi gng


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Trng CM 16x16 vi 32 si quang


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Nhc im: Qung ng dch chuyn ca lungsng qua trng chuyn mch bin thin ph thucvo v tr cng vo/ra => suy hao qua trng chuynmch. S lng vi gng tng ln di dng bnhphngca s lng cng vo/ra, kch thc cachuyn mch quang MEMS 2D b gii hn vo

khong 32x32 hoc 1024 vi gng. Cc yu t chnhto ra s gii hn ny l kch thc ca chp vkhong cch tuyn nh sng phi truyn qua khnggian t do trong trng chuyn mch v s binthin suy hao t cngvo n cng ra.

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Kin trc chuyn mch quang MEMS ba chiu

c xy dng bng cch s dng 2 mng vigng.

Trong kin trc ny, nghingca vi gngMEMS c th iu khin c theo khng gian

t do ba chiunh cu trc khung c kh vihai trc quay vung gc. Cu hnh c bn camt chuyn mch quang MEMS ba chiu vcu trc ca vi gng:

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Cng ging nh trong kin trc chuyn mch

quangMEMS hai chiu, chuyn mch quangMEMS ba chiu thc hin chuyn mch ton blung sng ti (c th l mt bc sng hocmt nhm cc bc sng) t si quang u vo

n si quang u ra theo yu cu => V vy, chai kin trc ny u yu cu cc b tch/ghpknh bc sngquang c lp vi trngchuyn mch.


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Hot ngthit lp kt ni chuyn mch qua

trng chuyn mch quang ba chiu c thchin bng cch iu khin nghing hai vi gngtng ng mt cch c lp nh hng nhsng t u vo ti u ra c yu cu.


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u im: Kin trc chuyn mch ny ph hp ch to cc trng chuyn mch c ln

vi s lng cng vo/ra ln n hng ngn.c bit l kin trc chuyn mch ny mbo suy hao xen thp v ng nht, t phthuc bc sng di cc iu kin hot ng

khc nhau. suy gim ca t l tn hiu trnnhiu SNR i vi tn hiu quang qua trngchuyn mch, tham s ch yu b gy ra doxuyn m, suy hao ph thuc phn cc v tn

sc/tn sc phn cc, l nh nht.


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Nhc im:NSX cn phi thit k thit b vi slng vi gng ln hn so vi s lng thc t yucu trong khi vic kt hp s lng ln cc vigng, kim tra v nh chun cho cc phn tchuyn mch cn rt nhiu thi gian honthnh. Mt khc, chuyn mch quang MEMS bachiu cn yu cu h thng iu khin vng kn

phc tpvi chnh xc cao iu khin cc vigng v mi gng li i hi h thng iu khinring rnn gii php ny c xu hng tr nn t, yu cu kch thc thit b ln hn v tiu th

nhiu ngun hn.


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So snh CN chuyn mch quang


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Hin nay, cng ngh quang MEMS angnhn c squan tm c bit v chophp hin thc hacc hthng chuyn mch ton quang.

Cng ngh chuyn mch quang MEMSc kh nng chophp ch to trng chuyn mch c ln c lp vibc sng, tiu th in nng t, tin cy cao, suyhao xen thp v d dng nng cpvi chi ph hp l.

Bn cnh cc chuyn mch quang, cng ngh MEMSquang cn ang c tp trung nghin cu v pht trinng dng cho nhiu thit b quang khc nh b suy gimquang bin i c, laser kh chnh hay cc b lc

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Nhóm 10 CHUYỂN MẠCH QUANG

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