Zivisa iyo bandwidth uye nguva yekusimuka kweiyo photodetector
Iyo bandwidth uye nguva yekusimuka (inozivikanwawo senguva yekupindura) yephotodetector zvinhu zvakakosha mukuedzwa kweiyo optical detector. Vanhu vazhinji havana ruzivo nezve maparameter maviri aya. Ichi chinyorwa chichanyatso suma bandwidth uye nguva yekusimuka yephotodetector.
Nguva yekusimuka ( τr ) uye nguva yekudonha ( τf ) zvose zviri zviviri zviratidzo zvakakosha zvekuyera kumhanya kwekupindura kwemafotodetectors. Iyo 3dB bandwidth, sechiratidzo mune frequency domain, yakabatana zvakanyanya nenguva yekusimuka maererano nekumhanya kwekupindura. Ukama huri pakati pe bandwidth BW ye photodetector uye nguva yekupindura kwayo Tr inogona kushandurwa zvishoma neyiyi inotevera formula: Tr = 0.35 / BW.
Kusimuka nguva ishoko mune pulse tekinoroji, inotsanangura uye inoreva kuti chiratidzo chinosimuka kubva pane imwe nzvimbo (kazhinji: Vout * 10%) kune imwe pfungwa (kazhinji: Vout * 90%). Iyo amplitude yekukwira kumucheto kweRise Time chiratidzo kazhinji inoreva nguva inotorwa kusimuka kubva pa10% kusvika pa90%. Test musimboti: Chiratidzo chinofambiswa neimwe nzira, uye imwe sampling musoro inoshandiswa kuwana uye kuyera iyo voltage pulse kukosha kumucheto kure.
Nguva yekusimuka kwechiratidzo yakakosha pakunzwisisa nyaya dzechiratidzo chekuvimbika. Iwo mazhinji ematambudziko ane chekuita nekuita kwechigadzirwa application mudhizaini yeakakwira-kumhanya bandwidth photodetectors inobatanidzwa nayo. Paunosarudza photodetector, inofanira kupiwa zvakakwana. Nguva yekusimudza ine simba guru pakushanda kwedunhu. Chero bedzi iri mukati meimwe nhanho, inofanira kutorwa zvakakomba, kunyange kana iri mutsara usina kujeka zvikuru.
Sezvo nguva yekusimuka kwechiratidzo ichidzikira, matambudziko akadai sekuratidzira, crosstalk, kudonha kwemhepo, electromagnetic radiation, uye kubhururuka kwepasi kunokonzerwa nechiratidzo chemukati kana chiratidzo chekubuda chephotodetector chinova chakanyanya, uye dambudziko reruzha rinowedzera kuoma kugadzirisa. Kubva pakuona kwekutarisa kwekutarisa, kuderedzwa kwechiratidzo chekusimudza nguva kwakaenzana nekuwedzera kwechiratidzo che bandwidth, ndiko kuti, kune zvimwe zvikamu zvepamusoro-frequency muchiratidzo. Ndizvo chaizvo izvi zvikamu zvepamusoro-frequency zvinoita kuti dhizaini yakaoma. Mitsetse yekubatanidza inofanirwa kubatwa semitsara yekutapurirana, izvo zvakonzera matambudziko mazhinji akange asati avapo.
Naizvozvo, mukuita kwekushandisa kwemafotodetectors, iwe unofanirwa kuve uine pfungwa yakadai: kana iyo yekubuda chiratidzo cheiyo photodetector iine mawere ekukwira kana kunyange yakanyanyisa overshoot, uye chiratidzo chisina kugadzikana, zvinogoneka kuti iyo photodetector yawakatenga haizadzise zvinodiwa dhizaini yekuvimbika kwechiratidzo uye haigone kuzadzisa zvaunoda chaizvo zvekushandisa maererano nebandwidth uye kusimuka nguva paramita. Iwo mafotoelectric detector zvigadzirwa zveJIMU Guangyan ese maekiseni azvino epamberi mafotoelectric machipisi, anomhanya-mhanya anoshanda amplifier machipisi, uye chaiwo mafirita maseketi. Zvinoenderana neiyo chaiyo yekushandisa chiratidzo maitiro evatengi, ivo vanofananidza bandwidth uye nguva yekusimuka. Nhanho imwe neimwe inofunga nezvekuvimbika kwechiratidzo. Dzivisa matambudziko akajairika akadai seruzha rwechiratidzo chepamusoro uye kusagadzikana kwakashata kunokonzerwa nekusawirirana pakati pebandwidth uye nguva yekusimuka mukushandiswa kwemafotodetectors kune vashandisi.
Nguva yekutumira: Sep-29-2025