Izinhlobo ze-electro-optic modulators zichazwe kafushane

I-electro-optical modulator (EOM) ilawula amandla, isigaba kanye ne-polarization ye-laser beam ngokulawula isignali nge-elekthronikhi.
Imoduli ye-electro-optic elula kakhulu iyimoduli yesigaba ehlanganisa ibhokisi le-Pockels elilodwa kuphela, lapho inkambu kagesi (esetshenziswa kukristalu nge-electrode) ishintsha ukubambezeleka kwesigaba se-laser beam ngemva kokungena kwekristalu. Isimo se-polarization se-beam yesigameko ngokuvamile sidinga ukuhambisana nenye yezimbazo ezibonakalayo zekristalu ukuze isimo se-polarization ye-beam singashintshi.

Kwezinye izimo kudingeka ukushintshwa kwesigaba esincane kakhulu (i-periodic noma i-aperiodic). Isibonelo, i-EOM ijwayele ukusetshenziselwa ukulawula kanye nokuzinzisa imvamisa ye-resonant yama-optical resonators. Amamojula we-resonance ngokuvamile asetshenziswa ezimeni lapho kudingeka khona ukuguquguquka ngezikhathi ezithile, futhi ukujula okukhulu kokuguquguquka kungatholwa nge-voltage yokushayela emaphakathi kuphela. Kwesinye isikhathi ukujula kokuguquguquka kukhulu kakhulu, futhi ama-sidelobe amaningi (ijeneretha yekama elikhanyayo, ikamu elikhanyayo) akhiqizwa ku-spectrum.

I-polarization modulator
Ngokuya ngohlobo kanye nesiqondiso se-crystal engavamile, kanye nesiqondiso senkambu kagesi yangempela, ukubambezeleka kwesigaba kuhlobene nokuqondiswa kwe-polarization. Ngakho-ke, ibhokisi le-Pockels lingakwazi ukubona amapuleti amagagasi alawulwa ngama-voltage amaningi, futhi lingasetshenziswa ukulinganisa izimo ze-polarization. Ngokukhanya kokufaka okuhlukanisiwe komugqa (ngokuvamile ku-engeli engu-45° kusukela ku-crystal axis), ukuhlukaniswa kwe-polarization ye-beam ephumayo kuvame ukuba yi-elliptic, kunokumane izungeziswe nge-engeli ukusuka ekukhanyeni komugqa komugqa wokuqala.

I-amplitude module
Uma kuhlanganiswa nezinye izici ze-optical, ikakhulukazi ngama-polarizer, amabhokisi e-Pockels angasetshenziselwa ezinye izinhlobo zokuguquguquka. I-amplitude modulator ku-Figure 2 isebenzisa ibhokisi le-Pockels ukushintsha isimo se-polarization, bese isebenzisa i-polarizer ukuguqula ukuguqulwa kwesimo se-polarization ibe ushintsho ku-amplitude namandla okukhanya okudlulisiwe.
Ezinye izinhlelo zokusebenza ezijwayelekile ze-electro-optic modulators zifaka:
Ukumodela amandla we-laser beam, isibonelo, ukuphrinta i-laser, ukuqoshwa kwedatha yedijithali enesivinini esikhulu, noma ukuxhumana kwe-optical speed;
Isetshenziswa ezindleleni zokuzinzisa imvamisa ye-laser, isibonelo, kusetshenziswa indlela ye-Pound-Drever-Hall;
Ukushintsha kwe-Q kumalaser wesimo esiqinile (lapho i-EOM isetshenziswa khona ukuvala i-laser resonator ngaphambi kokushaywa kwemisebe);
Ukukhiya imodi esebenzayo (ukulahleka kwe-modulation ye-EOM noma isigaba sokukhanya kokuya nokubuya, njll.);
Ukushintsha ama-pulse kuzikhethi zokushaya kwenhliziyo, izikhulisamsindo ezivumayo kanye namalaser atshekisayo.