Kugira ngo abantu bahaze ibyifuzo byabo byo kumenya amakuru, igipimo cyo kohereza amakuru muri sisitemu z'itumanaho rya fibre optique kiriyongera umunsi ku wundi. Urusobe rw'itumanaho rya optique ruzatera imbere rugana ku muyoboro w'itumanaho wa fibre optique ufite umuvuduko mwinshi cyane, ubushobozi bunini cyane, intera ndende cyane, kandi ukoresheje ikoranabuhanga rya spectrum iri hejuru cyane. Transmitter ni ingenzi cyane. Transmitter y'ibimenyetso bya optique yihuta cyane igizwe ahanini na laser ikora carrier y'amatara, igikoresho gitanga ibimenyetso by'amashanyarazi, na modulator y'amashanyarazi yihuta cyane ihindura carrier y'amatara. Ugereranyije n'ubundi bwoko bwa modulator zo hanze, modulator za lithium niobate electro-optical zifite ibyiza byo gukoresha inshuro nyinshi, gutuza neza, ikigereranyo cyo kuzimira cyane, imikorere ihamye, umuvuduko mwinshi wo guhindura amakuru, urusaku ruto, guhuza byoroshye, ikoranabuhanga ryo gukora ibintu bikuze, nibindi. Ikoreshwa cyane muri sisitemu zo kohereza amakuru zihuta cyane, zifite ubushobozi bunini, kandi zikora intera ndende.
Voltage y'igice cy'umuraba ni ikintu cy'ingenzi cyane mu igenamiterere ry'umuyoboro wa electro-optic. Igaragaza impinduka mu muyoboro wa bias ujyanye n'ubukana bw'urumuri rwa modulator ya electro-optic kuva ku rugero ruto kugeza ku rugero rwo hejuru. Igena modulator ya electro-optic ku rugero runini. Uburyo bwo gupima neza kandi vuba voltage y'igice cy'umuraba wa modulator ya electro-optic ni ingenzi cyane mu kunoza imikorere y'igikoresho no kunoza imikorere yacyo. Voltage y'igice cy'umuraba wa modulator ya electro-optic irimo DC (igice cy'umuraba).
Voltage na Radiofrequency) voltage ya half-wave. Imikorere yo kohereza ya electro-optic modulator ni iyi ikurikira:
Muri byo harimo imbaraga z'urumuri zisohoka za modulator ya electro-optique;
Ni imbaraga z'urumuri zinjira muri modulator;
Ese ni ukubura k'icyuma gikoresha amashanyarazi (electro-optic modulator)?
Uburyo busanzwe bwo gupima voltage ya kimwe cya kabiri cy’umuraba burimo gukora cyane no gukuba inshuro ebyiri, bushobora gupima voltage ya DC (DC) y’igice cy’umuraba n’iy’igice cy’umuraba wa radio (RF) ya modulator.
Imbonerahamwe ya 1 Igereranya ry'uburyo bubiri bwo gupima voltage ya half-wave
| Uburyo bufite agaciro gakomeye | Uburyo bwo gukuba inshuro ebyiri | |
| Ibikoresho byo muri laboratwari | Ingufu za laser Modulator y'ubukana iri kugeragezwa Ingufu za DC zishobora guhindurwa ±15V Igipimo cy'ingufu z'urumuri | Isoko y'urumuri rwa laser Modulator y'ubukana iri kugeragezwa Ingufu z'amashanyarazi za DC zishobora guhindurwa Osiloskopi isoko y'ikimenyetso (DC Bias) |
| igihe cyo gupima | Iminota 20 () | Iminota 5 |
| Ibyiza byo kugerageza | byoroshye kugeraho | Ikizamini gikwiye cyane Ishobora kubona voltage ya DC igice cy'umuraba na voltage ya RF igice cy'umuraba icyarimwe |
| Ingaruka mbi ku igerageza | Igihe kirekire n'ibindi bintu, ikizamini ntabwo ari cyo Ikizamini cy'umugenzi cya DC cy'amashanyarazi igice cy'umuraba | Igihe kirekire ugereranyije Ibintu nk'ikosa rikomeye ryo gusesengura imiterere y'umuraba, n'ibindi, ikizamini ntabwo ari cyo |
Ikora ku buryo bukurikira:
(1) Uburyo bw'agaciro gakabije
Uburyo bwo gupima agaciro gakomeye bukoreshwa mu gupima voltage ya DC igice cy'umuraba wa modulator ya electro-optic. Ubwa mbere, nta kimenyetso cya modulation, umurongo w'imikorere yo guhererekanya wa modulator ya electro-optic uboneka upimye voltage ya DC bias n'impinduka z'ubukana bw'urumuri rusohoka, kandi uhereye ku murongo w'imikorere yo guhererekanya ukareba amanota ntarengwa y'agaciro n'agace k'agaciro ntarengwa, hanyuma ubone agaciro ka DC voltage ka Vmax na Vmin uko bikurikirana. Amaherezo, itandukaniro riri hagati y'aya gaciro abiri ya voltage ni voltage ya igice cy'umuraba Vπ=Vmax-Vmin ya modulator ya electro-optic.
(2) Uburyo bwo gukuba inshuro ebyiri
Byakoreshejwe uburyo bwo gukuba inshuro ebyiri mu gupima voltage ya RF y'igice cy'umuraba wa modulator ya electro-optic. Ongeraho mudasobwa ya DC bias na AC modulation signal kuri electro-optic modulator icyarimwe kugira ngo uhindure voltage ya DC iyo imbaraga z'urumuri rusohoka zihindutse ku gaciro ntarengwa cyangwa gato. Muri icyo gihe, kandi bishobora kugaragara kuri oscilloscope ya dual-trace ko ikimenyetso cyahinduwe kizagaragara nk'ihindagurika rya frequency double. Itandukaniro ryonyine ry'amashanyarazi ya DC ajyanye n'ihindagurika rya frequency ebyiri zegeranye ni voltage ya RF y'igice cy'umuraba wa modulator ya electro-optic.
Incamake: Uburyo bwo gupima agaciro gakomeye ndetse n'uburyo bwo gukuba inshuro ebyiri bishobora gupima voltage y'igice cy'umuraba wa modulator ya electro-optic mu buryo bwa teyori, ariko mu kugereranya, uburyo bwo gupima agaciro gakomeye busaba igihe kirekire cyo gupima, kandi igihe kirekire cyo gupima kizaterwa n'imbaraga z'urumuri rwa laser zihinduka kandi zigatera amakosa yo gupima. Uburyo bwo gupima agaciro gakomeye bugomba gusesengura DC bias hakoreshejwe agace gato k'intambwe no kwandika imbaraga z'urumuri rwa modulator icyarimwe kugira ngo haboneke agaciro gakomeye k'urumuri rwa DC igice cy'umuraba.
Uburyo bwo gukuba inshuro ebyiri ni uburyo bwo kumenya voltage y'igice cy'umuraba ureba imiterere y'umuraba uhora wikuba kabiri. Iyo voltage ya bias ikoreshejwe igeze ku gaciro runaka, gukuba inshuro nyinshi bibaho, kandi gukuba inshuro nyinshi ntibigaragara cyane. Ntibyoroshye kubibona n'amaso. Muri ubu buryo, bizatera amakosa akomeye cyane, kandi icyo bipima ni voltage y'igice cy'umuraba wa RF ya modulator ya electro-optic.