Amapharamitha ayisisekelo

Amapharamitha ayisisekelo esibonakalayo sesiginali ye-OpticalPhotoDeteectors:

Ngaphambi kokuhlola izinhlobo ezahlukahlukene zama-photodeeteectors, amapharamitha acacile wokusebenza kokusebenza kweIzifo ze-Optical Signal PhotoDeteectorszifingqiwe. Lezi zici zifaka phakathi ukuphendula, impendulo ebukekayo, amandla alinganayo omsindo (i-NEP), ukutholwa okuthile, kanye nokuthola okuthile. D *), ukusebenza kahle kwe-quantum, nesikhathi sokuphendula.

1. Ukuphendula i-RD kusetshenziselwa ukubonakalisa ukuzwela kwendlela yedivayisi kumandla wemisebe yemisebe ye-Optical. Imelelwa isilinganiso sokuphuma kwesiginali esigabeni sesigameko. Lesi sici asibonisi izici zomsindo zedivayisi, kepha kuphela ukusebenza kahle kokuguqula amandla wemisebe ye-electromagnetic ibe kumanje noma amavoti. Ngakho-ke, kungahluka nge-wavelength yesiginali yokukhanya kwesigameko. Ngaphezu kwalokho, izici zokuphendula amandla zamandla nazo zingumsebenzi we-bias esetshenzisiwe kanye nokushisa okukhona.

2. Isici sokuphendula esibonakalayo siyipharamitha ebeka ubudlelwano phakathi kokuphendula kwamandla komshini wesiginali we-optical Izici zokuphendula ezibukhali ze-Optical Signal PhotoDeteectors kuma-wavelength ahlukene ngokuvamile achazwa ngobuningi nge- "Pectral Ready Curve". Kumele kwaziwe ukuthi kuphela izici zokuphendula eziphakeme kakhulu ku-curve zilinganiswe yinani eliphelele, futhi ezinye izici zokuphendula ezibukeshini ezinama-wavelength ahlukene avezwa ngamanani ajwayelekile ahlobene nezimpawu eziphakeme kakhulu zezimpawu zokuphendula eziphakeme.

I-3. Amandla alinganayo ngomsindo ngumbuso wesiginali wokukhanya kwesigameko lapho kukhiqizwa khona amavolumu okuphuma akhiqizwa umtshina wesiginali we-optical alingana nezinga lomsindo wezembatho wezembatho. Kuyisici esiyinhloko esinquma ubukhulu bokuqina kwesiginali ye-Optical Optical engalinganiswa ngumtshina wesiginali we-Optical, okungukuthi, ukuzwela kokutholwa.

I-4. Ukuzwela okukhethekile kungukuqonda kwesimo esibonisa izici zemvelo zezinto ezibonakalayo zomtshina. Imelela i-Photon enesigameko ephansi kunazo zonke ezingalinganiswa ngumtshina wesiginali we-Optical Signal. Inani layo lingahluka ngokuya ngezimo zokusebenza zomtshina we-wavelength wesiginali elilinganisiwe (njengokushisa okukhona, okusetshenzisiwe kwe-bias, njll.). Lapho likhulisa i-bandwidth ye-detector, enkulu indawo yokuthola umtshina we-Optical Signal Detector, incane umsindo wamandla alinganayo we-NEP, futhi akhuphuka uzwela oluthile. Ukuzwela okuphezulu kokutholwa komtshina kusho ukuthi kufanelekile ukuthola amasiginali abonakalayo abuthaka kakhulu.

I-5. I-Quantum Effession Nacciening q kungenye indawo ebalulekile yesimo somtshina wesiginali we-optical. Kuchazwa njengesilinganiso senombolo yezimpendulo "ezihlonishwayo" ezikhiqizwa yi-Photomon emtshinini kwinombolo ye-Photon eyenzeka ebusweni bezinto ezibonakalayo. Isibonelo, ngokuthola izimpawu zesiginali ekhanyayo ezisebenza ku-Photon Emission, ukusebenza kahle kwe-quantum kungukuthi isilinganiso senombolo yama-photoleelectron akhishwe ebusweni bezithombe ezilinganiselwe ebusweni. Emnyani wesiginali we-Optical Signal usebenzisa izinto ze-semiconductor ezibonakalayo njengezinto ezibonakalayo ezibonakalayo, ukusebenza kahle komtshina kubalwa ngokuhlukanisa inani lama-elektroni umgodi okhiqizwe isibonakaliso esilinganiselwe sokukhanya ngenombolo yesigameko sesikhashana se-Photons. Okunye ukumelwa okuvamile kokusebenza kahle kwe-quantum yomshini wesiginali we-optical kungenxa ye-detector ression rd.

I-6 Lapho isiginali yokulinganisa ephakathi ilungiselelwe ibe yindlela yokukhanya okukhanyayo, ukuqina kwesiginali kagesi eshayelwa yisenzo sayo kudinga "ukuvuka" inani elithi "inani eliphakeme" bese ubuyela emuva ku-action of the pulse elikhanyayo. Ukuze uchaze impendulo yomtshina ekushintsheni kokuqina kwesiginali yokukhanya okulinganiselwe, isikhathi lapho ukuqina kwesiginali kagesi kukhiqizwa ngenani eliphakeme le-10% kuya ku-10% kubizwa ngokuthi "isikhathi sokuwa" noma "isikhathi sokuwa"

7 Kudinga ukuphuma kweumtshina wesiginali we-opticalukulingana ngaphakathi kwebanga elithile lokuqina kwesiginali ye-optical alinganise. Imvamisa kuchazwa ukuthi ukuphambuka kwamaphesenti kusuka kulayini wokufaka okufakiwe ngaphakathi kohlu olubekiwe lokufakwa kokufakwa kwe-Optical Signal Interiarity yokuphendula komshini wesiginali we-Optical.