Waa maxay modulator wejiga

Waa maxay amodulator wejiga

Modulator-ka wajiga waa modulator indhaha kaasoo xakameyn kara wejiga laydhka laysarka. Noocyada caadiga ah ee modulators wajiga waa sanduuqa Pockelsmodulators electro-opticiyo modulators crystal dareere ah, kuwaas oo sidoo kale ka faa'iidaysan kara isbeddellada index refractive fiber kulaylka ama dhererka beddelo, ama iyada oo iskala si ay u beddelaan dhererka. Modulators waji oo kala duwan ayaa loo adeegsadaa goobta isku dhafka indhaha, halkaasoo iftiinka la bedelay uu ku faafo mawjadaha.

Astaamaha muhiimka ah ee modulators wejiga waxaa ka mid ah: Baaxadda qaabaynta wejiga (taas oo go'aamisa index-ka habaynta iyo awoodda qaraabada ah ee dhinaca dhinaceeda) waxay u baahan tahay xawaaraha korantada modulada (kala duwanaanshaha soo noqnoqda modulation),modulator-ka-elektarooniga ahwaxay ku jirtaa nidaamka GHz, iyo aaladda isticmaalaysa saamaynta kulaylka ama walxaha dareeraha ah ayaa aad uga yar inta xawaaraha hawlgalka ee daloolka aaladda. Waxay xaddidaysaa radius-ka biimka la hagaajiyay ee cabbirrada dibadda ee qalabka guryahani aad bay ugu kala duwan yihiin noocyada kala duwan ee modulators wajiga. Sidaa darteed, modulators waji kala duwan ayaa loo baahan yahay in loo isticmaalo codsiyo wax ku ool ah oo kala duwan.

Tusaalooyinka codsiyada modulator-ka wajiga waxaa ka mid ah: Modulator-ka wajiga ee resonator laser hal-frequency laser waxaa loo isticmaali karaa hagaajinta hirarka dhererka, ama hab-qufulka firfircoonida (qaabka FM-locking) ee laysarka si loo wajaho iftiinka haddii uu leeyahay xoojinta modulation dhexdhexaad ah, waxaa loo isticmaali karaa habka xasilinta laser-ka, tusaale ahaan, Habka-Pell-Dreverfe interspectro Aaladaha, sida caadiga ah isticmaalaya calaamadaha wadista xilliyeedka. Cabbiraadaha qaarkood waxay u baahan yihiin shanlooyinka soo noqnoqda, kuwaas oo lagu helo shilkal laydh-soo noqnoqda ah oo galay modulator-ka wajiga. Xaaladdan oo kale, habaynta marxaladda badanaa waxay u baahan tahay inay noqoto mid xooggan, si aad u hesho meelo badan oo dhinaca ah. Gudbiyaha xogta ee nidaamka isgaarsiinta fiber indhaha, modulator-ka wejiga waxaa loo isticmaali karaa si loo kala saaro macluumaadka la kala qaado. Tusaale ahaan, habka furaha-wareejinta ayaa la isticmaalaa.