Bandwidth uye mutoro wemudziyo wekuona foto
PakusarudzaInGaAs photodetector, munhu wese anoda zvinhu zvakafanana: bandwidth iri pamusoro pe10 GHz uye reactivity iri pamusoro pe0.9 A/W. Mushure mekuvhura bhuku rekushandisa data, ndakaona kuti nhamba idzi mbiri hadzimboonekwi pamudziyo mumwe chete. Kupindura kwebandwidth yakakwira kunongova 0.5 A/W kana kutodzikira, uye bandwidth yakakwira inongova mazana mashoma eMHz. Iri harisi dambudziko rehunyanzvi nemugadziri - bandwidth uye reactivity zvinopesana mufizikisi, uye haugone kuva nazvo zvese nenzira mbiri.
Bandwidth uye reactivity inyaya inopokana, inobva muchikamu chakakosha chekukora kweabsorption layer. Kuwedzera ukobvu hweabsorption layer kunogona kuvandudza kushanda kwe quantum (zvichizowedzera reaction), asi zvichawedzera nguva yekufambisa yevatakuri vecharge (zvichideredza bandwidth); Zvakapesana. Saka, mukugadzirwa kwe standard PIN photodetector, zviviri izvi hazvigone kuwanikwa panguva imwe chete uye kubvumirana kunofanira kuitwa.
Chirongwa chekubudirira muindasitiri:
Chinyorwa ichi chinopa mhinduro nhatu dzepamusoro-soro dzetekinoroji dzakanangana nekupedza kusawirirana uku:
Chinoongorora mafungu emagetsi (WGPD): Chinobvisa nzira yekupararira kwechiedza kubva kunzira yekudzungaira kwevanotakura machaji, uye chinogona kuwana bandwidth yakakwira (>40 GHz) uye kugona kupindura kwakakwira (>0.9 A/W) panguva imwe chete, asi maitiro acho akaoma uye mutengo wakakwira.
Chinoongorora maerekitironi ekufambisa anofamba nenzira imwe chete (UTC-PD): Chinoshandisa maerekitironi anomhanya zvakanyanya chete pakudzungaira, zvichibvisa nguva yekufamba kwemaburi anomhanya zvishoma, chinogona kuwana bandwidth yakakwira zvakanyanya (>100 GHz) uye chinowanzoshandiswa mukukurukurirana kwakakwira uye minda yeterahertz.
Resonant cavity enhanced photodetector (RCE): Ichishandisa optical resonant cavity kuti iwedzere kupinza chiedza mukati me thin absorption layer, inogona kuvandudza quantum efficiency uku ichichengetedza high bandwidth, asi operating bandwidth (spectral range) yakamanikana zvikuru.
Mazano ekusarudza mapurojekiti:
Tsanangura zvinodiwa pakutanga: Kutanga, sarudza bandwidth shoma inodiwa ye photodetector zvichibva pa bandwidth yesignali yesystem (ine muganho wekatatu), wobva wasarudza modhi ine mhinduro yepamusoro pasi pemamiriro aya.
Teererai zviratidzo zvemazinga ehurongwa: Pakuongorora photodetector, chenjererai simba reruzha (NEP) uye kunzwisiswa kwehurongwa, kwete kungonzwa chete, sezvo kunzwika kwakanyanya kunogona kuperekedzwa neruzha rukuru.
Funga nezveChinoongorora mufananidzo cheAPDmune zviitiko zvine simba shoma: Kana simba rechiedza chechiitiko rakaderera zvikuru (senge<-30 dBm), kuwedzera kwemukati kweavalanche photodiode (APD photodetector) kunogona kushandiswa kutsiva kushaya simba rekuita, asi kungwarira kunofanira kupihwa kune ruzha rwayo rwakawandisa.
Kusarudza WGPD ine zvinodiwa zvepamusoro uye bhajeti yakakwira: Kana sisitimu ichida bandwidth yakakwira (>20 GHz) uye kugona kwayo kushanda (>0.8 A/W), maPIN detectors akajairwa haakwanise kusangana nezvinodiwa, uye ma waveguide type detectors (WGPD) anofanira kufungwa nezvawo zvakananga.
Mhedziso:
Kuchinjana kwebandwidth responsivity ye standardChinoongorora mufananidzo chePINidambudziko guru riripo. Kuti zvibudirire zvechokwadi, panodiwa hunyanzvi muchimiro chemudziyo kuti ubvise nzira yekupinza chiedza kubva munzira yekutakura zvinhu. Mhinduro dzemhando yepamusoro dzine mashandiro akanaka asi dzinodhura zvakanyanya, saka mukuita kweinjiniya, zvichiri kudikanwa kuita chibvumirano pakati pemamiriro chaiwo ekushandisa, zvinodiwa pakushanda, uye bhajeti.
Nguva yekutumira: Kubvumbi-13-2026