Sabon tsarin electro-optic modulator mai matuƙar girman ƙarewa

Na baya-bayan nanbabban rabo na ƙarewa mai ƙarfi na lantarki mai amfani da na'urar aunawa ta lantarki

Masu daidaita wutar lantarki ta hanyar amfani da na'urorin lantarki masu amfani da wutar lantarki (wanda aka yi da silicon, triquinoid, lithium niobate mai bakin ciki, da sauransu) suna da fa'idodin ƙanƙantawa, saurin gudu da ƙarancin amfani da wutar lantarki, amma har yanzu akwai manyan ƙalubale don cimma daidaitaccen ƙarfin lantarki tare da rabon ƙarewa mai matuƙar girma. Kwanan nan, masu bincike a Cibiyar Bincike ta Haɗin gwiwa don Fiber Optic Sensing a wata jami'ar China sun sami babban ci gaba a fannin masu daidaita wutar lantarki masu amfani da wutar lantarki masu amfani da wutar lantarki masu amfani da wutar lantarki masu amfani da wutar lantarki masu amfani da wutar lantarki masu amfani da wutar lantarki masu amfani da wutar lantarki masu amfani da wutar lantarki masu amfani da wutar lantarki masu amfani da wutar lantarki masu amfani da wutar lantarki masu amfani da wutar lantarki masu amfani da wutar lantarki. Dangane da tsarin matattarar hasken lantarki mai inganci, silicon mai amfani da wutar lantarki mai amfani da wutar lantarkina'urar sarrafa na'urar lantarki (electro-optical modulator)Tare da rabon ƙarewa har zuwa 68 dB, an fara gano shi. Girman da yawan amfani da wutar lantarki sun fi girma fiye da na gargajiya.Mai daidaita AOM, kuma an tabbatar da yuwuwar amfani da na'urar a cikin tsarin DAS na dakin gwaje-gwaje.

Hoto na 1 Tsarin zane na na'urar gwaji don ultrababban rabo na ƙarewa na lantarki mai amfani da na'urar lantarki

An yi shi da siliconena'urar sarrafa haske ta lantarki (electro-optical modulator)Dangane da tsarin matattarar microring da aka haɗa, yana kama da matattarar lantarki ta gargajiya. Mai daidaita electro-optic yana cimma matattarar bandpass mai faɗi da babban rabon ƙin yarda daga band (>60 dB) ta hanyar haɗa jerin abubuwan haɗin microring guda huɗu da aka yi da silicon. Tare da taimakon mai canza yanayin electro-optical na nau'in Pin-type a cikin kowane microring, ana iya canza bakan watsawa na mai daidaita wutar lantarki sosai a ƙaramin ƙarfin lantarki da aka yi amfani da shi (<1.5 V). Babban rabon ƙin yarda daga band tare da halayyar juyawar matattarar mai tsayi yana ba da damar daidaita ƙarfin hasken shigarwa kusa da raƙuman resonant tare da babban bambanci, wanda ke da matukar amfani ga samar da bugun haske mai ƙarfi na ƙarewa.

Domin tabbatar da ikon daidaitawa na na'urar lantarki mai amfani da na'urar lantarki, ƙungiyar ta fara nuna bambancin watsawa na na'urar tare da ƙarfin DC a tsawon tsayin aiki. Ana iya ganin cewa bayan 1 V, watsawa ta faɗi sosai fiye da 60 dB. Saboda iyakancewar hanyoyin lura da oscilloscope na gargajiya, ƙungiyar bincike ta ɗauki hanyar auna tsangwama ta kai-heterodyne, kuma ta yi amfani da babban kewayon motsi na spectrometer don kwatanta rabon ɓacewa mai ƙarfi na na'urar yayin daidaita bugun jini. Sakamakon gwaji ya nuna cewa bugun hasken fitarwa na na'urar yana da rabon ɓacewa har zuwa 68 dB, kuma rabon ɓacewa fiye da 65 dB kusa da wurare da yawa na raƙuman sauti. Bayan lissafi dalla-dalla, ainihin ƙarfin lantarki na tuƙi na RF da aka ɗora a cikin na'urar lantarki yana da kusan 1 V, kuma yawan amfani da wutar lantarki mai daidaitawa shine 3.6 mW kawai, wanda shine tsari biyu na girma ƙasa da yawan amfani da wutar lantarki na na'urar AOM mai amfani da na'urar.

Ana iya amfani da na'urar sarrafa electro-optic ta Silicon a cikin tsarin DAS zuwa tsarin gano kai tsaye ta hanyar tattara na'urar sarrafa on-chip. Ba kamar na'urar sadarwa ta heterodyne ta gida ba, an ɗauki yanayin demodulation na Michelson interferometry mara daidaito a cikin wannan tsarin, don haka ba a buƙatar tasirin canjin mitar gani na na'urar. Canje-canjen lokaci da siginar girgiza sinusoidal ke haifarwa an dawo da su cikin nasara ta hanyar demodulation na siginar Rayleigh da aka watsar na tashoshi 3 ta amfani da algorithm na IQ demodulation na al'ada. Sakamakon ya nuna cewa SNR yana kusan 56 dB. Ana ƙara bincika rarraba yawan spectral na wutar lantarki tare da tsawon fiber na firikwensin a cikin kewayon mitar sigina ±100 Hz. Baya ga siginar da aka fi sani a matsayin girgiza da mita, an lura cewa akwai wasu amsoshin yawan spectral na wutar lantarki a wasu wurare na sarari. Hayaniyar crosstalk a cikin kewayon ±10 Hz da wajen matsayin girgiza ana daidaita su tare da tsawon zaren, kuma matsakaicin SNR a cikin sarari bai gaza 33 dB ba.

Hoto na 2

Tsarin tsarin ji da gani na tsarin firikwensin sauti na fiber na gani.

b Ƙarfin siginar da aka rage girmansa.

c, d Mitocin girgiza kusa da rarrabawar yawan hasken wutar lantarki tare da zaren firikwensin.

Wannan binciken shine na farko da ya cimma wani na'urar auna haske ta lantarki akan silicon tare da rabon karewa mai yawa (68 dB), kuma an yi amfani da shi cikin nasara ga tsarin DAS, kuma tasirin amfani da na'urar auna haske ta kasuwanci AOM yana da kusanci sosai, kuma girman da amfani da wutar lantarki sun fi ƙanƙanta da na ƙarshe, wanda ake sa ran zai taka muhimmiyar rawa a cikin ƙarni na gaba na tsarin gano fiber mai ƙarancin ƙarfi. Bugu da ƙari, tsarin kera manyan CMOS da ikon haɗa kan guntu na tushen siliconna'urorin lantarki na optoelectroniczai iya haɓaka ci gaban sabon ƙarni na na'urori masu araha masu araha da yawa waɗanda aka haɗa bisa tsarin firikwensin fiber da aka rarraba akan guntu.