Mndandanda wa Chowunikira Zithunzi: Chiyambi cha Chowunikira Zithunzi Cholondola

Chiyambi chaChowunikira Zithunzi Cholondola(Optoelectronic Balance Detector)
Chojambulira cha Balance Photo chingagawidwe m'magulu awiri: mtundu wa fiber optic coupling ndi mtundu wa spatial optical coupling malinga ndi njira yolumikizira ma optical. Mkati mwake, chimakhala ndi ma photodiode awiri ofanana kwambiri, module ya transimpedance amplifier circuit ya phokoso lotsika, komanso module yamphamvu ya phokoso lotsika kwambiri. Ili ndi mawonekedwe a high common mode rejection ratio, ultra-low noise, ndi high bandwidth, ndipo imagwiritsidwa ntchito kwambiri pankhani yolumikizirana kwa coherent optical. Chakhala malo ofufuzira kwambiri amakampani ndi mayunivesite m'maiko osiyanasiyana m'zaka zaposachedwa.
Mfundo yogwirira ntchito ya Balance Photodetector (Chowunikira Kusamala kwa Optoelectronic)
Chowunikira cha Balance Photo chimagwiritsa ntchito ma photodiode awiri omwe ali mu reverse bias state ngati gawo lolandira kuwala. Polandira chizindikiro cha kuwala, photocurrent yopangidwa ndi ma photodiode awiri imachotsedwa ndikulumikizidwa ku transimpedance amplifier kuti isinthe chizindikiro chamakono kukhala chizindikiro cha voltage kuti chituluke. Kugwiritsa ntchito kapangidwe ka kudzichepetsera kumatha kuletsa bwino chizindikiro cha common mode chomwe chimayambitsidwa ndi kuwala kwa oscillator ndi mdima, kuwonjezera chizindikiro cha differential mode, komanso mpaka pamlingo wina kukonza luso lozindikira zizindikiro zofooka za kuwala.
Ubwino: Chiŵerengero chachikulu cha kukana njira yofanana, kukhudzidwa kwakukulu, komanso kuchuluka kwa bandwidth yozindikira kumatha kukwaniritsa zochitika zosiyanasiyana za pulogalamu.
Zoyipa: Mphamvu yochepa ya kuwala, yoyenera kuzindikira kuwala kofooka kokha, kuphatikiza kumafunika kukonzedwa.

CHITHUNZI: Chithunzi cha mfundo yogwirira ntchito ya chowunikira bwino
Magawo a magwiridwe antchito a Balance Photodetector (Optoelectronic)Chowunikira Kulinganiza)
1. Kuyankha
Kuyankha kumatanthauza kugwira ntchito bwino kwa photodiode posintha zizindikiro za kuwala kukhala photocurrent, yomwe ndi chiŵerengero cha photocurrent ndi mphamvu ya kuwala. Kusankha photodiode yokhala ndi kuyankha kwakukulu kungathandize kwambiri kuti Balance Photodetector ikhale ndi mphamvu.
Kuyankha kumatanthauza kugwira ntchito bwino kwa photodiode posintha zizindikiro za kuwala kukhala photocurrent, yomwe ndi chiŵerengero cha photocurrent ndi mphamvu ya kuwala. Kusankha photodiode yokhala ndi kuyankha kwakukulu kungathandize kwambiri kuti Balance Photodetector ikhale ndi mphamvu.
2. Bandwidth
Bandwidth imayimira ma frequency a chizindikiro chomwe amplitude ya chizindikiro chotulutsa cha Balance Photodetector imawonongeka ndi -3dB, ndipo imagwirizana ndi capacitance ya parasitic ya photodiode, kukula kwa transimpedance, ndi gain bandwidth product ya operational amplifier.
3. Chiŵerengero cha kukana kwa njira yodziwika bwino
Chiŵerengero cha kukana kwa njira yodziwika bwino chimagwiritsidwa ntchito poyesa kuchuluka kwa kuletsa kwa zizindikiro za njira yodziwika bwino ndi zida zowunikira bwino, ndipo zinthu zamalonda nthawi zambiri zimafuna kukana kwa njira yodziwika bwino kwa 25dB.
4.NEP
Mphamvu Yofanana ndi Phokoso: Mphamvu ya chizindikiro cholowera yomwe imafunika pa chiŵerengero cha chizindikiro-kwa-phokoso cha 1, chomwe ndi chofunikira kwambiri poyesa magwiridwe antchito a phokoso la dongosolo. Zigawo zazikulu za phokoso lolinganiza bwino ndi phokoso lofalikira ndi phokoso lamagetsi.

Kugwiritsa ntchito Balance Photodetector (Optoelectronic Balance Detector)
M'zaka zaposachedwapa, Balance Photodetector yakhala ikugwiritsidwa ntchito kwambiri m'magawo monga laser wind radar, laser vibration measurement, fiber optic sensing, weak light coherent detection, spectral detection, gas detection, etc. Kafukufuku wokhudza liwiro lalikulu, bandwidth yayikulu, phokoso lotsika, high common mode rejection ratio, komanso kukhudzidwa kwakukulu kwa ma balanced detectors apanga zinthu zatsopano ndipo akupita patsogolo kwambiri kuti agwirizane kwambiri ndi kugwiritsa ntchito mphamvu zochepa kuti akwaniritse zochitika zosiyanasiyana zogwiritsidwa ntchito.