Uhlelo lokuhlukaniswa kanye nokuguqulwa kwe-modulator ye-laser

Uhlelo lokuhlukaniswa kanye nokuguqulwa kwe-modulator ye-laser

I-modulator ye-laseruhlobo lwezingxenye ze-laser zokulawula, aluyona into eyisisekelo njengamakristalu, amalensi nezinye izingxenye, futhi aluhlanganisiwe kakhulu njengama-laser,imishini ye-laser, izinga eliphezulu lokuhlanganiswa, izinhlobo kanye nemisebenzi yemikhiqizo yekilasi ledivayisi. Kusukela ekubonakalisweni okuyinkimbinkimbi kwegagasi lokukhanya, kungabonakala ukuthi izici ezithinta igagasi lokukhanya ukuqina kwe-A(r), isigaba Φ(r), imvamisa ω kanye nezici ezine zesiqondiso sokusabalala, ngokulawula lezi zici kungashintsha isimo segagasi lokukhanya, i-laser modulator ehambisanayo iyi-i-modulator yokuqina, i-phase modulator, i-frequency shifter kanye ne-deflector.

1. I-Intensity modulator: esetshenziselwa ukuguqula ubukhulu noma ukuphakama kwe-laser, lapho ama-optical attenuators, amasango e-optical emele kakhulu, kanye namadivayisi nemishini ehlanganisiwe njengezihlukanisi zesikhathi, iziqinisi zamandla, ama-antenuators omsindo.

2. I-modulator yesigaba: esetshenziswa ukulawula isigaba somsebe, ukwanda kwesigaba kubizwa ngokuthi i-lag, ukwehla kwesigaba kubizwa ngokuthi i-lead. Kunezinhlobo eziningi zama-phase modulators, futhi izimiso zawo zokusebenza zihlukile kakhulu, njengezi-photoelastic modulators, ama-LN high-speed electro-optical phase modulators, ama-liquid crystal variable phase delay sheets, njll., wonke angama-phase modulators asekelwe ezimisweni zokusebenza ezahlukene.

3. I-frequency shifter: esetshenziselwa ukushintsha imvamisa yamaza okukhanya, isetshenziswa kabanzi ezinhlelweni ze-laser ezisezingeni eliphezulu noma imishini yokumaka, kanye ne-acousto-optical frequency shifter njengommeleli ojwayelekile.

4. I-Deflector: esetshenziselwa ukushintsha indlela yokusabalala kwe-beam, uhlelo lwe-galvanometer olujwayelekile lungenye yazo, ngaphezu kwe-mems galvanometer esheshayo, i-electro-optical deflector kanye ne-acousto-optical deflector.

Sinomqondo ojwayelekile we-laser modulator, okungukuthi, izingxenye ezingalawula futhi zishintshe izakhiwo ezithile zomzimba ze-laser, kodwa sifuna ukwethula ngokugcwele imikhiqizo ethile ye-laser modulator, isihloko esisodwa kuphela esikwanele. Ngakho-ke, okokuqala, gxila ku-intensity modulator. I-Intensity modulator njengohlobo lwe-modulator esetshenziswa kabanzi kuzo zonke izinhlobo zezinhlelo ze-optical, ukuhlukahluka kwayo, ukusebenza okuhlukile kungachazwa njengokuyinkimbinkimbi, namuhla ukwethula uhlelo lwe-intensive modulator olune oluvamile: uhlelo lwe-mechanical, uhlelo lwe-electro-optic, uhlelo lwe-acousto-optic kanye nohlelo lwe-liquid crystal.

1. Uhlelo lwemishini: i-mechanical strength modulator iyona modulator yamandla yokuqala nesetshenziswa kakhulu. Umgomo ukushintsha isilinganiso sokukhanya kwe-s kanye nokukhanya kwe-p ekukhanyeni okuhlanganisiwe ngokujikeleza ipuleti le-half-wave, nokuhlukanisa ukukhanya nge-polarizer. Kusukela ekulungisweni kokuqala ngesandla kuya kokuzenzakalelayo kakhulu nokunembile kwanamuhla, izinhlobo zemikhiqizo yayo kanye nokuthuthukiswa kohlelo lokusebenza sekuvuthiwe kakhulu.

2. Uhlelo lwe-Electro-optical: i-modulator ye-electro-optical intensity modulator ingashintsha ubukhali noma ubukhulu bokukhanya oku-polarized, isimiso sisekelwe kumphumela we-Pockels wamakristalu e-electro-optical. Isimo se-polarization somsebe o-polarized siyashintsha ngemva kokusetshenziswa kwekristalu ye-electro-optic enensimu kagesi, bese i-polarization ihlukaniswa ngokukhetha yi-polarizer. Ubukhali bokukhanya okukhishwe bungalawulwa ngokushintsha ubukhali bensimu kagesi, futhi umkhawulo wokukhuphuka/wokuwa kobukhulu be-ns ungafinyelelwa.

3. Uhlelo lwe-Acousto-optic: i-modulator ye-acousto-optic ingasetshenziswa futhi njenge-modulator yokuqina. Ngokushintsha ukusebenza kahle kwe-diffraction, amandla okukhanya okungu-0 nokukhanya okungu-1 angalawulwa ukuze kufezwe injongo yokulungisa ukuqina kokukhanya. Isango le-Acoustooptic (i-optical attenuator) linezici zesivinini sokuguquguquka okusheshayo kanye nomkhawulo womonakalo omkhulu.

4 Isixazululo sekristalu eliwuketshezi: idivayisi yekristalu eliwuketshezi ivame ukusetshenziswa njengepuleti lamagagasi aguquguqukayo noma isihlungi esilungisekayo, ngokusebenzisa i-drive voltage kuzo zombili izinhlangothi zebhokisi lekristalu eliwuketshezi ukuze kufakwe isici sokwehlukanisa ngokunemba, kungenziwa kube yi-liquid crystal shutter noma i-variable attenuator, umkhiqizo unembobo enkulu ngokusebenzisa ukukhanya, izici zokuthembeka okuphezulu.