Ihame ryibanze rya Optical modulator

Moderi nziza, ikoreshwa mugucunga ubukana bwurumuri, gutondekanya amashanyarazi-optique, thermooptic, acoustooptic, byose optique, inyigisho yibanze yingaruka za electro-optique.
Moderi ya optique nimwe mubikoresho byingenzi byahujwe nibikoresho bya optique muburyo bwihuse kandi bugufi bwitumanaho rya optique. Moderi yumucyo ukurikije ihame ryayo ryo guhindura, irashobora kugabanywa muri electro-optique, thermooptic, acoustooptic, optique yose, nibindi, nibindi, bishingiye kumyumvire yibanze nuburyo butandukanye bwingaruka za electro-optique, ingaruka za acoustooptic, ingaruka za magnetooptic , Ingaruka ya Franz-Keldysh, kwant kwiza Ingaruka nziza, ingaruka zo gutwara.

Uwitekaamashanyarazi ya optiqueni igikoresho kigenga indangagaciro zivunagura, kwinjiza, amplitude cyangwa icyiciro cyumucyo usohoka binyuze mumihindagurikire yumuriro cyangwa amashanyarazi. Iraruta ubundi bwoko bwa modulator mubijyanye no gutakaza, gukoresha ingufu, umuvuduko no kwishyira hamwe, kandi ni na moderi ikoreshwa cyane muri iki gihe. Muburyo bwo kohereza optique, guhererekanya no kwakirwa, moderi optique ikoreshwa mugucunga ubukana bwurumuri, kandi uruhare rwayo ni ngombwa cyane.

Intego yo guhindura urumuri ni uguhindura ibimenyetso wifuza cyangwa amakuru yatanzwe, harimo "gukuraho ibimenyetso byerekana inyuma, gukuraho urusaku, no kurwanya kwivanga", kugirango byoroshye gutunganya, kohereza no kumenya.

Ubwoko bwa modulasiyo bushobora kugabanywamo ibyiciro bibiri bigari bitewe n’aho amakuru yinjizwa ku mucyo:

Imwe ni imbaraga zo gutwara isoko yumucyo yahinduwe nikimenyetso cyamashanyarazi; Ibindi ni uguhindura ibiganiro bitaziguye.

Iyambere ikoreshwa cyane cyane mu itumanaho ryiza, naho iyanyuma ikoreshwa cyane muburyo bwo kumva. Kuri make: modulisiyo y'imbere hamwe na modulisiyo yo hanze.

Ukurikije uburyo bwo guhindura, ubwoko bwa modulation ni:

1) Guhindura ubukana;

2) Guhindura icyiciro;

3) Guhindura polarisiyasi;

4) Guhindura inshuro nuburebure bwumurongo.

1.1, guhinduranya ubukana

Guhinduranya urumuri ni ubukana bwurumuri nkikintu cyo guhinduranya, gukoresha ibintu byo hanze kugirango bipime DC cyangwa ihinduka ryihuse ryikimenyetso cyurumuri muburyo bwihuse bwihuse bwikimenyetso cyumucyo, kugirango amplifier ya AC yumurongo wa AC ishobora gukoreshwa. kwagura, hanyuma amafaranga agomba gupimwa ubudahwema.

1.2, icyiciro

Ihame ryo gukoresha ibintu byo hanze kugirango uhindure icyiciro cyumucyo wumucyo no gupima ingano yumubiri mugushakisha impinduka zicyiciro bita optique ya modulasiyo.

Icyiciro cyumucyo ugenwa nuburebure bwumubiri bwikwirakwizwa ryumucyo, indangagaciro yo kugabanya uburyo bwo gukwirakwiza no gukwirakwiza kwayo, ni ukuvuga ko ihinduka ryicyiciro cyumucyo rishobora kubyara muguhindura ibipimo byavuzwe haruguru Kugera ku cyiciro cyo guhindura.

Kubera ko urumuri rusanzwe rudashobora kubona ihinduka ryicyiciro cyumucyo wumucyo, tugomba gukoresha tekinoroji yivanga yumucyo kugirango duhindure icyiciro cyihinduka ryimbaraga zumucyo, kugirango tugere ku kumenya ibintu bifatika byo hanze, kubwibyo , icyiciro cya optique modulasiyo igomba kuba irimo ibice bibiri: kimwe nuburyo bwumubiri bwo kubyara icyiciro cyimpinduka zumucyo; Iya kabiri ni ukubangamira urumuri.

1.3. Guhindura polarisiyasi

Inzira yoroshye yo kugera kumucyo ni ukuzenguruka polarizeri ebyiri ugereranije. Ukurikije theorem ya Malus, ibisohoka byumucyo ni I = I0cos2α

Aho: I0 yerekana ubukana bwurumuri rwanyuze kuri polarizeri ebyiri mugihe indege nyamukuru ihamye; Alpha yerekana Inguni hagati yindege ebyiri za polarizeri.

1.4 Guhindura inshuro nuburebure bwumurongo

Ihame ryo gukoresha ibintu byo hanze kugirango uhindure inshuro cyangwa uburebure bwumucyo no gupima ingano yumubiri igaragara muguhindura impinduka mumurongo cyangwa uburebure bwumucyo byitwa inshuro nuburebure bwumucyo.