Ububanzi bebhendi kunye noxanduva lweisixhobo sokubona iifoto
Xa ukhethaIsixhobo sokubona iifoto se-InGaAs, wonke umntu ufuna iinkcukacha ezifanayo: i-bandwidth engaphezulu kwe-10 GHz kunye nokuphendula okungaphezulu kwe-0.9 A/W. Emva kokujonga incwadi yemiyalelo yedatha, ndifumanise ukuba la manani mabini awaveli kwisixhobo esinye. Ukuphendula okuphezulu kwe-bandwidth yi-0.5 A/W okanye ngaphantsi, kwaye i-bandwidth ephezulu ye-responsive yi-MHz embalwa nje. Le ayingombandela wobuchwephesha kumenzi - i-bandwidth kunye nokuphendula kuyaphikisana ngokwemvelo kwifiziksi, kwaye awunakuba nazo zombini iindlela.
Ububanzi bebhendi kunye nokuphendula kukuphikisana okubonakalayo, okusekelwe kwiparameter ebalulekileyo yobukhulu beleya yokufunxa. Ukwandisa ubukhulu beleya yokufunxa kunokuphucula ukusebenza kakuhle kwe-quantum (ngaloo ndlela kuphucula ukuphendula), kodwa kuya kwandisa ixesha lokuhamba kwabathwali betshaja (ngaloo ndlela kunciphisa ububanzi bebhendi); Ngokuphambeneyo. Ke ngoko, kuyilo lwe-PIN photodetector esemgangathweni, ezi zimbini azinakuphunyezwa ngaxeshanye kwaye kufuneka kwenziwe isivumelwano.
Isicwangciso sokuphumelela kushishino:
Eli nqaku lizisa izisombululo ezintathu zobuchwepheshe ezikumgangatho ophezulu ezijolise ekupheliseni le ngxabano:
Isixhobo sokufumana i-Waveguide type detector (WGPD): Sihlukanisa indlela yokusasazwa kokukhanya ukusuka kwicala lokushukuma kwezithuthi zetshaja, kwaye sinokufikelela kwi-bandwidth ephezulu (>40 GHz) kunye nokuphendula okuphezulu (>0.9 A/W) ngaxeshanye, kodwa inkqubo inzima kwaye ixabiso liphezulu.
I-Unidirectional Carrier Transport photodetector (UTC-PD): Isebenzisa ii-electron ezikhawulezayo kuphela ukutyibilika, isusa umda wexesha lokuhamba kwemingxunya yesantya esiphantsi, inokufikelela kwi-bandwidth ephezulu kakhulu (>100 GHz) kwaye isetyenziswa rhoqo kwiinkalo zonxibelelwano olukhawulezayo kunye ne-terahertz.
I-Resonant cavity enhanced photodetector (RCE): Ukusebenzisa i-optical resonant cavity ukuphucula ukufunxwa kokukhanya ngaphakathi komaleko omncinci wokufunxwa, kunokuphucula ukusebenza kakuhle kwe-quantum ngelixa kugcinwa i-bandwidth ephezulu, kodwa i-operating bandwidth (uluhlu lwe-spectral) incinci kakhulu.
Iingcebiso zokukhetha iprojekthi:
Cacisa ukubaluleka kweemfuno: Okokuqala, misela imfuneko ye-bandwidth encinci ye-photodetector ngokusekelwe kwi-bandwidth yesignali yenkqubo (ene-margin yezihlandlo ezi-3), uze ukhethe imodeli enokuphendula okuphezulu phantsi kwale meko.
Nika ingqalelo kwizalathisi zenqanaba lenkqubo: Xa uvavanya i-photodetector, kufuneka kunikwe ingqalelo kumandla alinganayo nengxolo (i-NEP) kunye novakalelo lwenkqubo, kungekuphela nje ukusabela, njengoko ukusabela okuphezulu kunokuhamba nengxolo ephezulu.
CingaIsixhobo sokubona ifoto se-APDkwiimeko zamandla aphantsi: Xa amandla okukhanya kwesiganeko esezantsi kakhulu (njenge<-30 dBm), i-internal gain ye-avalanche photodiode (i-APD photodetector) ingasetyenziselwa ukuhlawula ukungabikho kokuphendula, kodwa kufuneka kuqwalaselwe ingxolo yayo engaphezulu.
Ukukhetha i-WGPD eneemfuno eziphezulu kunye nohlahlo lwabiwo-mali oluphezulu: Xa inkqubo ifuna zombini i-bandwidth ephezulu (>20 GHz) kunye nokuphendula okuphezulu (>0.8 A/W), ii-PIN detectors eziqhelekileyo azikwazi ukuhlangabezana neemfuno, kwaye ii-waveguide type detectors (WGPD) kufuneka ziqwalaselwe ngokuthe ngqo.
Isiphelo:
Urhwebo lokuphendula kwe-bandwidth yomgangathoIsixhobo sokubona ifoto sePINyimqobo ebonakalayo. Ukuze iphumelele ngokwenene, kufuneka ubuchule kwisakhiwo sesixhobo ukuze kuhlukaniswe ngokwasemzimbeni indlela yokufunxa ukukhanya kwindlela yokuthutha yenkampani. Izisombululo eziphezulu zisebenza kakuhle kodwa zibiza kakhulu, ngoko ke kwindlela yobunjineli, kusafuneka kwenziwe isivumelwano phakathi kweemeko ezithile zesicelo, iimfuno zokusebenza, kunye nohlahlo-lwabiwo mali.
Ixesha lokuthumela: Epreli-13-2026