Basic hunhu parameters optical chiratidzo photodetectors

Basic characteristic parameters ye optical signalphotodetectors:

Usati waongorora maitiro akasiyana-siyana e photodetectors, maitiro ehutano hwekushanda kwekushanda kweoptical chiratidzo photodetectorszvakapfupikiswa. Aya maitiro anosanganisira responsivity, spectral response, noise yakaenzana simba (NEP), chaiyo detectivity, uye chaiyo detectivity. D*), quantum kunyatsoita, uye nguva yekupindura.

1. responsivity Rd inoshandiswa kuratidza mhinduro yekunzwa kwechigadzirwa kune optical radiation simba. Inomiririrwa nereshiyo yechiratidzo chekubuda kune chiitiko chiratidzo. Hunhu uhwu hahuratidzi hunhu hweruzha rwechishandiso, asi chete kugona kwekushandura electromagnetic radiation simba kuita yazvino kana voltage. Nokudaro, inogona kusiyana nehurefu hwechiratidzo chechiedza chechiitiko. Uye zvakare, iwo masimba ekupindura maitiro zvakare ibasa reyakasarurwa yakarerekera uye ambient tembiricha.

2. Iyo spectral response character is a parameter inoratidza hukama pakati pesimba remhinduro hunhu hwe optical signal detector uye wavelength basa rechiitiko optical signal. Maitiro ekupindura maitiro eiyo optical signal photodetectors pawavelengths akasiyana anowanzo kutsanangurwa kuwanda ne "spectral response curve". Izvo zvinofanirwa kucherechedzwa kuti iwo chete epamusoro spectral mhinduro maitiro mucurve anoyerwa nehukoshi hwakakwana, uye humwe hunhu hwekupindura hunoonekwa pamawavelengths akasiyana hunoratidzwa neakajairwa hukama hunoenderana nekukosha kwepamusoro kwehunhu hwekupindura.

3. Iyo ruzha yakaenzana simba ndiyo chiitiko chemwenje chiratidzo simba rinodiwa kana yakabuda chiratidzo voltage inogadzirwa neiyo optical signal detector yakaenzana neiyo inherent ruzha voltage level yemudziyo pachayo. Icho chinhu chikuru chinogadzirisa hushoma hwechiratidzo chemagetsi chinogona kuyerwa ne-optical signal detector, kureva, kunzwisisika kwekuona.

4. Kunyatsoona kunzwisiswa kwehutano hutsika hunofananidzira hutsika hunoita hutsika hwemifananidzo yemifananidzo ye detector. Inomiririra yakaderera chiitiko photon ikozvino density inogona kuyerwa neoptical signal detector. Kukosha kwayo kunogona kusiyanisa maererano nemamiriro ekushanda kwewavelength detector yechiratidzo chechiedza chakayerwa (senge tembiricha yakadzika, kurerekera kunoshandiswa, nezvimwewo). Iyo yakakura iyo detector bandwidth, yakakura iyo optical sign detector nzvimbo, iyo diki iyo ruzha yakaenzana simba NEP, uye yakakwirira chaiyo yekuona senitivity. Iyo yakakwirira chaiyo yekuona senitivity ye detector inoreva kuti inokodzera kuonekwa kweakanyanya kusimba zviratidzo zvemaziso.

5. Quantum kunyatsoshanda Q ndechimwe chinhu chakakosha chechiratidzo che optical signal detector. Inotsanangurwa sereshiyo yehuwandu hwehuwandu hwe "mhinduro" dzinogadzirwa neiyo photomon mu detector kusvika kuhuwandu hwemafotoni chiitiko pamusoro peiyo photosensitive zvinhu. Semuyenzaniso, pamagetsi emagetsi emwenje anoshanda paphoton emission, quantum performance ireshiyo yenhamba yemaphotoelectrons anoburitswa kubva pamusoro pezvinhu zvinonzwisiswa nemifananidzo kusvika kunhamba yemafotoni echiratidzo chakayerwa chinoratidzwa pamusoro. Muchidhinha chemagetsi chemaziso chinoshandisa pn junction semiconductor material sezvinhu zvinonzwisiswa, kuwanda kwe quantum ye detector inotarwa nekupatsanura nhamba ye electron hole pairs inogadzirwa nechiedza chakayerwa chiratidzo nenhamba yechiitiko chiratidzo mafotoni. Imwe inomiririra yakajairika yehuwandu hwehuwandu hweiyo optical signal detector ndeye nzira ye detector responsivity Rd.

6. Nguva yekupindura ndiyo parameter yakakosha kuratidza kukurumidza kwekupindura kweiyo optical signal detector kune kuchinja kwesimba kwechiratidzo chechiedza chakayerwa. Kana chiratidzo chechiedza chakayerwa chikagadziridzwa kuita chimiro chekupuruzira kwechiedza, kusimba kweiyo pulse yemagetsi chiratidzo inogadzirwa nekuita kwayo pa detector inoda "kusimuka" kune inoenderana "peak" mushure meimwe nguva yekupindura, uye kubva " peak" uye wozodzokera kune yekutanga "zero value" inoenderana nekuita kwechiedza chekupuruzira. Kuti utsanangure mhinduro ye detector kune kusimba kwekuchinja kwechiratidzo chechiedza chakayerwa, nguva iyo kusimba kwechiratidzo chemagetsi chinogadzirwa nechiitiko chiedza pulse chinokwira kubva pamutengo wepamusoro we10% kusvika 90% inonzi "kusimuka." nguva ", uye nguva iyo chiratidzo chemagetsi pulse waveform inodonha kubva pakukosha kwayo kwe90% kusvika ku10% inonzi "nguva yekudonha" kana "nguva yekuora".

7. Response linearity ndiyo imwe inokosha hunhu parameter inoratidzira hukama hwekushanda pakati pekupindura kweiyo optical signal detector uye kusimba kwechiitiko kuyerwa chiratidzo chechiedza. Zvinoda kubuda kweoptical chiratidzo detectorkuti ive yakaenzana mukati mehumwe huwandu hwekusimba kweyakayerwa chiratidzo chemaziso. Zvinowanzo tsanangurwa kuti kutsauka kwezana kubva kune yekupinza-yekubuda mutsara mukati meiyo yakatsanangurwa siyana yeiyo yekuisa optical sign intensity ndiyo mhinduro yemutsara weiyo optical signal detector.