Codsiga Modulation Electro-Optic ee Isgaadhsiinta indhaha

/Codsiga-Electro-optic-modulation-in-optical-communication/

Nidaamku wuxuu isticmaalaa hirarka iftiinka si uu u gudbiyo macluumaadka codka. Laysarka uu dhaliyo layserku wuxuu noqdaa iftiin toosan ka dib polarizer-ka, ka dibna wuxuu noqdaa iftiin wareeg ah ka dib saxanka mawjada λ / 4, si labada qaybood ee polarization (o light iyo e light) ay soo saaraan π / 2 waji farqi ka hor inta aanad gelin crystal-optical crystal, si modulator-ku uu uga shaqeeyo gobolka toosan ee qiyaasaha ah. Isla marka uu leysku dhex maro crystal-optic-ka, koronto dibadeed ayaa lagu dabaqayaa crystal-optic-ka. Danabkani waa calaamada dhawaaqa ee la gudbinayo.

Marka danabku lagu daro crystal-optic crystal, index refractive iyo sifooyinka kale ee indhaha ee kristal isbeddelka, beddelaan xaaladda polarization ee hirarka iftiinka, si ay iftiinka wareegga ah uu noqdo iftiin elliptical ah, ka dibna uu noqdo iftiin toosan polarized. iyada oo loo marayo polarizer-ka, iyo iftiinka iftiinka ayaa la beddelay. Waqtigaan, mowjadda iftiinka waxay ka kooban tahay macluumaad dhawaaqa waxayna ku faafisaa meel bannaan. Sawir-qaade waxa loo isticmaalaa in lagu helo calaamadda indhaha ee la beddelay ee goobta la helayo, ka dibna beddelka wareegga ayaa la sameeyaa si loogu beddelo calaamadda indhaha ee signalka korantada. Calaamadaha dhawaaqa waxaa dib u soo celiya demodulator, iyo ugu dambeyntii gudbinta indhaha ee signalka dhawaaqa waa la dhammeeyaa. Danabka la dabaqay waa signalka dhawaaqa la kala qaado, kaas oo noqon kara wax soo saarka cod-qaadaha raadiyaha ama cajalad-wadista, run ahaantiina waa calaamad danab ah oo kala duwan waqti ka dib.