A umshini wokuthola izithombeiyithuluzi eliguqula izimpawu zokukhanya zibe izimpawu zikagesi.isitholi sesithombe se-semiconductor, isithwali esikhiqizwe ngesithombe esivuselelwe yi-photon yesigameko singena kwisekethe yangaphandle ngaphansi kwe-voltage ye-bias esetshenzisiwe futhi sakhe i-photocurrent elinganisekayo. Ngisho noma isabela kakhulu, i-photodiode yephini ingakhiqiza kuphela amabhangqa amabili e-electron-hole okungenani, okuyidivayisi engenanzuzo yangaphakathi. Ukuze kuphenduleke kakhulu, i-i-photodiode yeqhwa(apd) ingasetshenziswa.
Umphumela wokukhulisa we-apd ku-photocurrent usekelwe kumphumela wokushayisana kwe-ionization. Ngaphansi kwezimo ezithile, ama-electron asheshisiwe kanye nezimbobo zingathola amandla anele okushayisana ne-lattice ukukhiqiza umbhangqwana omusha wama-electron-hole pairs. Le nqubo iyindlela yokusabela kweketanga, ukuze umbhangqwana wama-electron-hole pairs akhiqizwe ukumuncwa kokukhanya ukhiqize inani elikhulu lama-electron-hole pairs futhi wakhe i-photocurrent enkulu yesibili. Ngakho-ke, i-apd inokuphendula okuphezulu kanye nenzuzo yangaphakathi, okuthuthukisa isilinganiso sesignali-kuya-kumsindo sedivayisi. I-apd izosetshenziswa kakhulu ezinhlelweni zokuxhumana ze-fiber ye-optical ezikude noma ezincane ezineminye imikhawulo emandleni optical atholiwe. Njengamanje, ochwepheshe abaningi bedivayisi ye-optical banethemba elikhulu ngamathuba e-apd.
I-Rofea ithuthukise ngokuzimela i-photodetector ehlanganisiwe ye-photodiode kanye ne-low noise amplifier circuit, ngenkathi inikeza imikhiqizo eyahlukahlukene, kubasebenzisi bocwaningo lwesayensi. Ihlinzeka ngesevisi yokwenza ngokwezifiso umkhiqizo esezingeni eliphezulu, ukwesekwa kwezobuchwepheshe kanye nensizakalo elula ngemuva kokuthengisa. Umugqa womkhiqizo wamanje uhlanganisa: i-analog signal photodetector ene-amplification, i-gain adjustable photodetector,i-photodetector yesivinini esiphezulu, isitholi semakethe yeqhwa (i-APD), isitholi sebhalansi, njll.
Isici
Ububanzi be-Spectral：320-1000nm、850-1650nm、950-1650nm、1100-1650nm、1480-1620nm
I-bandwidth ye-3dB：200MHz-50GHz
Okukhiphayo kokuxhuma kwefayibha ye-Optical 2.5Gbps
Uhlobo lwe-Modulator
I-3dBbandwidt：
200MHz, 1GHz, 10GHz, 20GHz, 50GHz
Isicelo
Ukutholwa kwe-pulse ye-optical esheshayo
Ukuxhumana kwe-optical okusheshayo okuphezulu
Isixhumanisi se-microwave
Uhlelo lokuzwa i-fiber optical lwe-Brillouin
Isikhathi sokuthunyelwe: Juni-21-2023