Cov khoom tseem ceeb ntawm kev kuaj photodetector

Cov khoom tseem ceeb ntawmphotodetectorkuaj

Lub sijhawm bandwidth thiab lub sijhawm nce (tseem hu ua lub sijhawm teb) ntawm photodetectors, raws li cov khoom tseem ceeb hauv kev kuaj ntawm cov cuab yeej ntes, tam sim no tau nyiam cov neeg tshawb nrhiav optoelectronic ntau. Txawm li cas los xij, tus sau tau pom tias ntau tus neeg tsis nkag siab txog ob qhov kev txwv no txhua. Niaj hnub no, JIMu Optoresearch yuav qhia tshwj xeeb txog bandwidth thiab nce lub sijhawm ntawm photodetectors rau txhua tus.

Nyob rau hauv tsab xov xwm dhau los ntawm kev xaiv cov tseem ceeb tsis rauphotodiodes, peb tau qhia tias ob lub sijhawm nce (τr) thiab lub caij nplooj zeeg (τf) yog cov cim tseem ceeb rau kev ntsuas cov lus teb ceev ntawm photodetectors. Lub 3dB bandwidth, raws li qhov taw qhia nyob rau hauv lub zaus sau, yog ze ze rau lub sij hawm sawv ntawm cov lus teb ceev. Kev sib raug zoo ntawm bandwidth BW ntawm lub photodetector thiab nws lub sij hawm teb Tr tuaj yeem hloov siab los ntawm cov qauv hauv qab no: Tr = 0.35 / BW.

Lub sij hawm sawv yog ib lo lus hauv tshuab mem tes, piav qhia thiab lub ntsiab lus tias lub teeb liab nce ntawm ib qho taw tes (feem ntau: Vout * 10%) mus rau lwm qhov (feem ntau: Vout * 90%). Lub amplitude ntawm lub nce ntug ntawm lub Rise Time teeb liab feem ntau yog hais txog lub sij hawm coj mus nce los ntawm 10% mus rau 90%. Lub hauv paus ntsiab lus ntawm kev xeem: Lub teeb liab raug xa mus raws ib txoj hauv kev, thiab lwm lub taub hau coj mus kuaj yog siv los ntsuas thiab ntsuas qhov ntsuas hluav taws xob ntawm qhov chaw taws teeb.

Lub sijhawm nce ntawm lub teeb liab yog qhov tseem ceeb rau kev nkag siab txog teeb meem kev ncaj ncees. Feem ntau ntawm cov teeb meem ntsig txog cov khoom siv kev ua tau zoo hauv kev tsim ntawmhigh-ceev photodetectoryog txuam nrog nws. Thaum xaiv lub photodetector, koj yuav tsum tau them sai sai rau nws. Nws yog ib qho tseem ceeb uas peb tsim kom muaj lub tswv yim tias lub sij hawm sawv cev muaj feem cuam tshuam rau kev ua haujlwm hauv Circuit Court. Tsuav nws nyob rau hauv ib qho chaw, nws yuav tsum tau ua tiag tiag, txawm tias nws yog qhov tsis meej heev. Tsis muaj qhov yuav tsum tau ua kom meej meej cov qauv no, thiab tsis yog qhov tseem ceeb ntawm cov tswv yim. Tsuas yog nco ntsoov tias tam sim no nti ua tshuab tau ua lub sijhawm no luv heev, mus txog qib ps. Nws yog lub sijhawm rau koj los saib xyuas nws qhov cuam tshuam.

Raws li lub teeb liab nce lub sij hawm txo, cov teeb meem xws li kev xav, crosstalk, orbit vau, electromagnetic radiation, thiab av thaws los ntawm lub teeb liab sab hauv los yog tso zis teeb liab ntawm lub photodetector yuav hnyav dua, thiab cov suab nrov teeb meem yuav nyuaj dua los daws. Los ntawm qhov kev xav ntawm spectral tsom xam, qhov txo ntawm lub teeb liab nce lub sij hawm yog sib npaug rau qhov nce ntawm cov teeb liab bandwidth, uas yog, muaj ntau ntau zaus hauv cov teeb liab. Nws yog precisely cov high-frequency Cheebtsam uas ua rau tus tsim nyuaj. Cov kab sib txuas yuav tsum tau kho raws li cov kab sib txuas, uas tau ua rau muaj ntau yam teeb meem uas tsis muaj nyob ua ntej.

Yog li ntawd, nyob rau hauv daim ntawv thov txheej txheem ntawm photodetectors, koj yuav tsum muaj xws li ib lub tswv yim: thaum lub tso zis teeb liab ntawm lub photodetector muaj ib tug ntxhab nce ntug los yog txawm overshoot loj heev, thiab lub teeb liab tsis ruaj tsis khov, nws muaj peev xwm heev uas tus photodetector koj yuav tsis tau raws li qhov tsim nyog tsim nyog rau lub teeb liab kev ncaj ncees thiab tsis tau raws li koj cov ntaub ntawv thov tiag tiag raws li bandwidth thiab nce lub sij hawm parameters. Cov khoom lag luam photoelectric ntes ntawm JIMU Guangyan tag nrho cov qauv tshiab tshaj plaws photoelectric chips, high-speed ua haujlwm amplifier chips, thiab cov lim lim. Raws li qhov tseeb daim ntawv thov teeb liab tus yam ntxwv ntawm cov neeg siv khoom, lawv phim lub bandwidth thiab nce lub sij hawm. Txhua kauj ruam yuav siv sij hawm mus rau hauv tus account qhov ncaj ncees ntawm lub teeb liab. Zam tsis txhob muaj teeb meem xws li lub teeb liab suab nrov thiab kev ruaj ntseg tsis zoo los ntawm kev tsis sib haum xeeb ntawm bandwidth thiab lub sij hawm nce hauv daim ntawv thov ntawm photodetectors rau cov neeg siv.