I-photodetector iyisisetshenziswa esiguqula amasignali okukhanya abe amasignali kagesi. Kusithwebuli sesithombe se-semiconductor, inkampani yenethiwekhi ekhiqizwe isithombe ejatshuliswe yi-photon yesigameko ingena kwisekethe yangaphandle ngaphansi kwe-voltage yokuchema esetshenzisiwe bese yenza i-photocurrent elinganisekayo. Ngisho nasekuphenduleni okuphezulu, i-pin photodiode ingakhiqiza kuphela amapheya e-electron-hole kakhulu, okuyidivayisi engenanzuzo yangaphakathi. Ukuze uthole ukusabela okukhulu, i-avalanche photodiode (apd) ingasetshenziswa.
Umthelela wokukhulisa i-apd ku-photocurrent usekelwe kumphumela wokungqubuzana kwe-ionization. Ngaphansi kwezimo ezithile, ama-electron asheshisiwe nezimbobo angathola amandla anele okushayisana ne-lattice ukukhiqiza ipheya entsha yamapheya embobo ye-electron. Le nqubo iwukusabela kweketango, ukuze amapheya amapheya e-electron-hole akhiqizwe ukumuncwa ukukhanya angakhiqiza inani elikhulu lamapheya e-electron-hole futhi enze i-photocurrent yesibili enkulu. Ngakho-ke, i-apd inokusabela okuphezulu kanye nenzuzo yangaphakathi, okuthuthukisa isilinganiso sesignali-kumsindo wedivayisi. i-apd izosetshenziswa kakhulu ezinhlelweni zokuxhumana ze-optical ezikude noma ezincane ezineminye imikhawulo emandleni okubona atholiwe. Njengamanje, ochwepheshe abaningi bemishini yokubona banethemba elikhulu mayelana namathemba e-apd.
I-Rofea ithuthukise ngokuzimela isithwebuli sesithombe esihlanganisiwe se-photodiode kanye nesekhethi yesikhulisi somsindo ophansi, kuyilapho ihlinzeka ngemikhiqizo eyahlukene, kubasebenzisi bocwaningo lwesayensi Nikeza isevisi yokwenza ngokwezifiso umkhiqizo, ukusekela kobuchwepheshe kanye nesevisi elula yangemva kokuthengisa. Ulayini womkhiqizo wamanje uhlanganisa: isithwebuli sesithombe se-analog esine-amplification, thola isithwebuli sesithombe esilungisekayo, isithwebuli sesithombe esinesivinini esikhulu, umtshina wemakethe yeqhwa (APD), umtshina webhalansi, njll.
Isici
Ububanzi be-Spectral: 320-1000nm, 850-1650nm, 950-1650nm, 1100-1650nm, 1480-1620nm
I-3dBbandwidth: 200MHz-50GHz
I-Optical fibre coupling output2.5Gbps
Uhlobo lwe-modulator
3dBbandwidt:
200MHz, 1GHz, 10GHz, 20GHz, 50GHz
Isicelo
Ukutholwa kwe-pulse optical ngesivinini esiphezulu
Ukuxhumana kwe-optical ngesivinini esiphezulu
Isixhumanisi se-microwave
I-Brillouin optical fibre sensing system
Isikhathi sokuthumela: Jun-21-2023