Yintoni i-phase modulator

Yintoni iimodyuli yesigaba

I-Phase modulator yi-optical modulator enokulawula i-phase ye-laser beam. Iindidi eziqhelekileyo ze-phase modulators zisekelwe kwi-Pockels box-basediimodulators ze-electro-optickunye nee-modulators zekristale yolwelo, ezinokusebenzisa utshintsho lwe-thermal fiber refractive index okanye utshintsho lobude, okanye ngokuzolula ukutshintsha ubude. Ii-modulators ezahlukeneyo zesigaba zisetyenziswa kwicandelo le-integrated optics, apho ukukhanya okulungisiweyo kusasaza kwi-waveguide.

Iimpawu ezibalulekileyo zeemodulators zesigaba ziquka: Ubungakanani bemodulation yesigaba (esimisela isalathisi semodulation kunye namandla ahambelanayo e-sideband) ifuna i-bandwidth ye-drive voltage modulation (uluhlu lwe-modulation frequency),i-modulator ye-electro-opticalikwi-GHz order, kwaye isixhobo esisebenzisa i-thermal effect okanye izinto zekristale yolwelo zincinci kakhulu kune-bandwidth yokusebenza kwe-device aperture. Inciphisa i-radius ye-beam ye-modulated beam Ubukhulu bangaphandle besixhobo Ezi mpawu zahluka kakhulu kwiintlobo ezahlukeneyo ze-phase modulators. Ke ngoko, ii-phase modulators ezahlukeneyo kufuneka zisetyenziswe kwizicelo ezahlukeneyo ezisebenzayo.

Imizekelo yezicelo ze-phase modulator ziquka: I-phase modulator kwi-laser resonator ye-single-frequency laser ingasetyenziselwa ukulungisa ubude be-wavelength, okanye i-active mode-locking (FM mode-locking) ye-laser ukuze ifake i-beam ukuba inomlinganiselo ophakathi we-modulation intensity, ingasetyenziswa kwindlela yozinziso lwe-laser frequency, umzekelo, Indlela ye-Pell-Drever-Hall ifuna ii-phase modulators kwizixhobo ezininzi zokulinganisa i-interferometer spectral, ngokuqhelekileyo zisebenzisa imiqondiso ye-periodic drive. Ezinye izilinganiso zifuna ii-frequency combs, ezifunyanwa ngokufaka i-single-frequency beam kwi-phase modulator. Kule meko, i-phase modulation idla ngokufuna ukuba yomelele, ukuze ufumane ama-side band amaninzi. Kwi-data transmitter yenkqubo yonxibelelwano lwe-optical fiber, i-phase modulator ingasetyenziselwa ukucacisa ulwazi oludlulisiweyo. Umzekelo, kusetyenziswa indlela ye-phase-shift keying.