Igipimo cy'itsinda (phase modulator) ni iki?

Ni ikimodulator y'icyiciro

Modulator y'icyiciro ni modulator y'urumuri ishobora kugenzura icyiciro cy'umurabyo wa laser. Ubwoko busanzwe bwa modulator y'icyiciro ni Pockels box-basedmodulators za electro-optiquen'ibikoresho bihindura imiterere y'urumuri rw'amazi, bishobora kandi kubyaza umusaruro impinduka z'imiterere y'urumuri rw'ubushyuhe cyangwa impinduka z'uburebure, cyangwa mu kurambura kugira ngo bihindure uburebure. Ibikoresho bitandukanye bihindura imiterere y'urumuri bikoreshwa mu bijyanye n'urumuri rw'amashanyarazi, aho urumuri ruhinduka rukwirakwira mu buryo bw'umuraba.

Imiterere y'ingenzi ya modulators z'icyiciro irimo: Ingano ya modulation y'icyiciro (igena index ya modulation n'imbaraga za relative ya sideband) isaba bandwidth ya modulation ya drive (urutonde rwa modulation frequency),modulator y'amashanyarazi n'amatarairi mu buryo bwa GHz, kandi igikoresho gikoresha ingaruka z'ubushyuhe cyangwa ibikoresho bya kristu y'amazi ni gito cyane ugereranyije n'uburyo igikoresho gikoresha. Bigabanya umurambararo w'umurambararo w'umurambararo wahinduwe Ingano zo hanze z'igikoresho Iyi miterere iratandukanye cyane ku bwoko butandukanye bwa modulators z'ibyiciro. Kubwibyo, modulators zitandukanye z'ibyiciro zigomba gukoreshwa mu buryo butandukanye.

Ingero z'ikoreshwa rya modulator y'icyiciro zirimo: Modulator y'icyiciro muri resonator ya laser ya single-frequency irashobora gukoreshwa mu gutunganya ubunini bw'umuraba, cyangwa active mode-locking (FM mode-locking) ya laser kugira ngo ishyireho imirabyo niba ifite imbaraga ziciriritse zo guhindura imirabyo, ishobora gukoreshwa mu buryo bwo gushimangira imirabyo ya laser, urugero, Uburyo bwa Pell-Drever-Hall busaba modulator z'icyiciro mu bikoresho byinshi byo gupima interferometer spectral, akenshi hakoreshejwe ibimenyetso byo gutwara igihe. Ibipimo bimwe na bimwe bisaba kohereza frequency, biboneka binyuze mu gushyira imirabyo y'icyiciro kimwe muri modulator y'icyiciro. Muri iki gihe, modulator y'icyiciro ubusanzwe igomba kuba ikomeye, kugira ngo ubashe kubona imigozi myinshi yo ku ruhande. Mu kohereza amakuru ya sisitemu y'itumanaho rya fibre optique, modulator y'icyiciro irashobora gukoreshwa mu gusobanura amakuru yoherejwe. Urugero, hakoreshwa uburyo bwo gufunga imirabyo ya phase-shift.