Ikigereranyo cya ultra-high extinction ratio electro-optic modulator

Ibishyaultra-high extinction ratio electro-optic modulator

Kuri chip chip electro-optique modulator (ishingiye kuri silicon, triquinoid, firime yoroheje ya lithium niobate, nibindi) ifite ibyiza byo guhuzagurika, umuvuduko mwinshi no gukoresha ingufu nke, ariko haracyari imbogamizi zikomeye zo kugera kumashanyarazi akomeye hamwe nikigereranyo cyo kuzimangana. Vuba aha, abashakashatsi bo mu kigo cy’ubushakashatsi cya Fibre Optic Sensing muri kaminuza yo mu Bushinwa bateye intambwe nini mu bijyanye na ultra-high extinction ratio electro-optique modulator kuri silicon substrate. Ukurikije urwego rwohejuru optique ya filteri yuburyo, on-chip siliconamashanyarazi ya optiquehamwe no kuzimangana kugera kuri 68 dB bigerwaho bwa mbere. Ingano nogukoresha ingufu nuburyo bubiri bwubunini buto kuruta ubwa gakondoModeri ya AOM, hamwe na progaramu ishoboka igikoresho igenzurwa muri laboratoire ya DAS.

Igishushanyo 1 Igishushanyo mbonera cyibikoresho byo gupima ultraigipimo kinini cyo kuzimira electro-optique modulator

Bishingiye kuri siliconamashanyarazi ya optiquehashingiwe kuri microring ya filteri yubatswe isa na classique ya mashanyarazi ya kera. Moderi ya electro-optique igera kumurongo wo kuyungurura no kugereranya kwangwa kwinshi (> 60 dB) binyuze murukurikirane rwo guhuza silikoni enye zishingiye kuri microring resonator. Hamwe nubufasha bwa Pin-ubwoko bwa electro-optique icyiciro cyo guhinduranya muri buri microring, imiyoboro ya transmitance ya modulator irashobora guhinduka cyane kuri voltage nkeya ikoreshwa (<1.5 V). Ikigereranyo cyo hejuru cyo kwangwa kwagabanijwe hamwe na filteri ihanamye yo kumanura ibintu biranga imbaraga zumucyo winjiza hafi yumurambararo wa resonant kugirango uhindurwe hamwe n’ikinyuranyo kinini cyane, gifasha cyane kubyara umusaruro urenze urugero rwinshi rwo kuzimangana.

Kugirango hamenyekane ubushobozi bwo guhindura imikorere ya moderi ya electro-optique, itsinda ryabanje kwerekana itandukaniro ryogukwirakwiza igikoresho hamwe na voltage ya DC kumurongo wuburebure. Birashobora kugaragara ko nyuma ya 1 V, itumanaho rigabanuka cyane hejuru ya 60 dB. Bitewe no kugabanya uburyo busanzwe bwo kwitegereza oscilloscope, itsinda ryubushakashatsi ryakoresheje uburyo bwo gupima interineti ya-heterodyne, kandi ikoresha intera nini ya dinamike ya spekrometrike kugirango iranga ikigereranyo cya ultra-high dinamike yo kuzimya modulator mugihe cyo guhinduranya pulse. Ibisubizo byubushakashatsi byerekana ko ibisohoka bisohora urumuri rwa modulator bifite igipimo cyo kuzimangana kugera kuri 68 dB, naho ikigereranyo cyo kuzimangana kirenga 65 dB hafi yimyanya myinshi yumurongo wa reonant. Nyuma yo kubara birambuye, amashanyarazi ya RF nyayo yapakiwe kuri electrode agera kuri 1 V, naho gukoresha ingufu za modulation ni mW 3,6 gusa, ibyo bikaba ari ordre ebyiri z'ubunini buto ugereranije no gukoresha amashanyarazi asanzwe ya AOM.

Porogaramu ya Silicon ishingiye kuri electro-optique modulator muri sisitemu ya DAS irashobora gukoreshwa kuri sisitemu ya DAS itaziguye mu gupakira moderi kuri chip. Bitandukanye nubusanzwe rusange-ibimenyetso bya heterodyne interferometrie, uburyo bwa demodulation ya interfeometrie ya Michelson itaringanijwe byemewe muri iyi sisitemu, kugirango ingaruka za optique yumurongo wa modulator idakenewe. Impinduka zicyiciro zatewe na sinusoidal vibration signal zagaruwe neza na demodulation ya Rayleigh itatanye ibimenyetso byimiyoboro 3 ukoresheje algorithm ya IQ isanzwe. Ibisubizo byerekana ko SNR igera kuri 56 dB. Ikwirakwizwa ryingufu zingana nuburebure bwa fibre ya sensor murwego rwikimenyetso cya ± 100 Hz iracyakurikiranwa. Usibye ikimenyetso kigaragara kumwanya wikinyeganyeza hamwe ninshuro, byaragaragaye ko hari ibisubizo bimwe na bimwe byerekana imbaraga zumuriro ahandi hantu. Urusaku rwambukiranya ruri hagati ya Hz 10 Hz no hanze yikibanza cyo kunyeganyega rwagereranijwe ku burebure bwa fibre, kandi impuzandengo ya SNR mu kirere ntabwo iri munsi ya 33 dB.

Igishushanyo 2

Igishushanyo mbonera cya fibre optique yagabanijwe sisitemu yo kumva.

b Kwerekana ibimenyetso byerekana imbaraga zingana.

c, d yinyeganyeza yumurongo hafi yingufu zogukwirakwiza gukwirakwiza fibre.

Ubu bushakashatsi nubwa mbere bugera kuri moderi ya electro-optique kuri silicon ifite igipimo cyinshi cyo kuzimangana (68 dB), kandi igashyirwa mubikorwa neza muri sisitemu ya DAS, kandi ingaruka zo gukoresha moderi yubucuruzi ya AOM irihafi cyane, kandi ingano nogukoresha ingufu ni amategeko abiri yubunini buto ugereranije nubwa nyuma, bikaba byitezwe ko bizagira uruhare runini mubisekuru bizaza bya sisitemu ntoya ya fibre sensibre. Mubyongeyeho, uburyo bunini bwo gukora bwa CMOS hamwe na chip yo guhuza ubushobozi bwa siliconibikoresho bya optoelectronicIrashobora guteza imbere cyane iterambere ryibisekuru bishya byigiciro gito, ibikoresho byinshi monolithic ihuriweho na modul ishingiye kuri-chip yatanzwe fibre sensing sisitemu.