Bandwidth da amsawar na'urar gano hoto

Bandwidth da amsawar amsawarna'urar gano hoto
Lokacin zabarna'urar gano hoto ta InGaAs, kowa yana son takamaiman bayanai iri ɗaya: bandwidth sama da 10 GHz da amsawa sama da 0.9 A/W. Bayan na juya littafin bayanin, na gano cewa waɗannan lambobi biyu ba sa bayyana a kan na'ura ɗaya. Babban amsawar bandwidth shine 0.5 A/W kawai ko ma ƙasa da haka, kuma babban bandwidth mai amsawa yana da ƴan ɗaruruwan MHz kawai. Wannan ba matsala ce ta fasaha ga masana'anta ba - bandwidth da amsawa suna da sabani a fannin kimiyyar lissafi, kuma ba za ku iya samun su ta hanyoyi biyu ba.
Faɗin da amsawa abu ne da ya saba wa jiki, wanda aka gina shi a cikin ma'aunin mahimmanci na kauri na Layer sha. Ƙara kauri na Layer sha zai iya inganta ingancin kwantum (ta hanyar haɓaka amsawa), amma zai tsawaita lokacin jigilar masu ɗaukar caji (ta hanyar rage bandwidth); Akasin haka. Saboda haka, a cikin ƙirar na'urar gano hoto ta PIN ta yau da kullun, ba za a iya cimma su biyun a lokaci guda ba kuma dole ne a yi sulhu.
Tsarin ci gaban masana'antu:
Labarin ya gabatar da mafita guda uku na fasaha masu inganci da nufin karya wannan sabanin:
Na'urar gano nau'in hasken wutar lantarki (WGPD): Tana raba alkiblar watsa haske daga alkiblar masu ɗaukar caji, kuma tana iya cimma babban bandwidth (>40 GHz) da kuma babban amsawa (>0.9 A/W) a lokaci guda, amma tsarin yana da sarkakiya kuma farashin yana da yawa.
Mai gano bayanai na jigilar kaya na Unidirectional Carrier Transport (UTC-PD): Yana amfani da electrons masu saurin gudu kawai don yin drift, yana kawar da iyakancewar lokacin wucewa na ramuka masu saurin gudu, yana iya cimma babban bandwidth (>100 GHz) kuma ana amfani da shi sosai a cikin manyan hanyoyin sadarwa da filayen terahertz.
Mai gano haske mai ƙarfin haske (RCE): Yin amfani da ramin hasken haske don haɓaka shaƙar haske a cikin ƙaramin Layer na sha, zai iya inganta ingancin kwantum yayin da yake riƙe babban bandwidth, amma bandwidth ɗin aiki (kewayon spectral) yana da kunkuntar sosai.
Shawarwari don zaɓar aikin:
Bayyana fifikon buƙatun: Da farko, ƙayyade mafi ƙarancin buƙatar bandwidth don na'urar gano hoto bisa ga bandwidth ɗin siginar tsarin (tare da gefe na sau 3), sannan zaɓi samfurin da ke da mafi girman amsawa a ƙarƙashin wannan yanayin.
Kula da ma'aunin matakin tsarin: Lokacin tantance na'urar gano haske, ya kamata a kula da ƙarfin da ya yi daidai da hayaniya (NEP) da kuma ƙarfin tsarin, ba kawai amsawa ba, domin amsawa mai yawa na iya kasancewa tare da babban hayaniya.
Yi la'akari dana'urar gano hoto ta APDa cikin yanayin ƙarancin wutar lantarki: Idan wutar lantarki ta faru ta yi ƙasa sosai (kamar <-30 dBm), ana iya amfani da ƙarfin hasken da ke cikin ruwan sama (APD photodetector) don rama rashin amsawar da aka samu, amma ya kamata a mai da hankali kan hayaniyar da ta wuce kima.
Zaɓar WGPD mai buƙatu masu yawa da kuma kasafin kuɗi mai yawa: Lokacin da tsarin ke buƙatar babban bandwidth (>20 GHz) da kuma babban amsawa (>0.8 A/W), na'urorin gano PIN na yau da kullun ba za su iya cika buƙatun ba, kuma ya kamata a yi la'akari da na'urorin gano nau'in jagorar raƙuman ruwa (WGPD) kai tsaye.
Kammalawa:
Canja wurin amsawar bandwidth na yau da kullunna'urar gano hoto ta PINiyakancewar jiki ce ta zahiri. Domin a shawo kanta da gaske, ana buƙatar kirkire-kirkire a cikin tsarin na'urori don rage tasirin hanyar ɗaukar haske daga hanyar jigilar kaya. Mafi kyawun mafita suna da kyakkyawan aiki amma farashi mai yawa, don haka a aikin injiniya, har yanzu yana da mahimmanci a yi sulhu tsakanin takamaiman yanayin aikace-aikace, buƙatun aiki, da kasafin kuɗi.