Ukuhlelwa kanye nohlelo lokushintshashintsha kwe-laser modulator

Ukuhlelwa kanye nohlelo lokushintshashintsha kwe-laser modulator

I-modulator ye-laseriwuhlobo lwezingxenye zokulawula ze-laser, aluyona into eyisisekelo njengamakristalu, amalensi nezinye izinto, futhi ayihlanganisiwe kakhulu njengama-lasers,imishini laser, izinga eliphezulu lokuhlanganiswa, izinhlobo nemisebenzi yemikhiqizo yekilasi ledivayisi. Kusukela ekukhulumeni okuyinkimbinkimbi kwegagasi lokukhanya, kungabonakala ukuthi izici ezithinta igagasi lokukhanya amandla A (r), isigaba Φ (r), imvamisa ω nezici ezine zendlela yokusabalalisa, ngokulawula lezi zici zingashintsha isimo segagasi lokukhanya, i-modulator ye-laser ehambisanayointensity modulator, i-modulator yesigaba, i-frequency shifter kanye ne-deflector.

1. I-intensity modulator: isetshenziselwa ukulinganisa ukuqina noma ukuphakama kwe-laser, lapho izixhumi ezibonakalayo, amasango okukhanya okuyiwona amele kakhulu, kanye namadivayisi ahlanganisiwe kanye nemishini efana nezihlukanisi zesikhathi, iziqinisi amandla, izinqamuli zomsindo.

2. I-modulator yesigaba: esetshenziselwa ukulawula isigaba se-beam, ukwanda kwesigaba kubizwa ngokuthi i-lag, ukwehla kwesigaba kubizwa ngokuthi ukuhola. Kunezinhlobo eziningi zamamodulators wesigaba, futhi izimiso zawo zokusebenza zihluke kakhulu, njengamamodulators e-photoelastic, ama-modulators wesigaba se-LN anesivinini esiphezulu se-electro-optical, amashidi okulibaziseka esigaba se-crystal eguquguqukayo, njll., zonke zingamamoduli wesigaba asekelwe ezimisweni zokusebenza ezihlukene.

3. I-Frequency shifter: esetshenziselwa ukushintsha imvamisa yamagagasi okukhanya, isetshenziswa kakhulu ezinhlelweni ze-laser ephezulu noma imishini yokwenza imephu, ne-acousto-optical frequency shifter njengommeleli ojwayelekile.

4. I-Deflector: isetshenziselwa ukushintsha isiqondiso sokusakazeka kwe-boam, uhlelo olujwayelekile lwe-galvanometer lungenye yazo, ngaphezu kwe-mems esheshayo i-galvanometer, i-deflector ye-electro-optical kanye ne-acousto-optical deflector.

Sinomqondo ojwayelekile wemodulator ye-laser, okungukuthi, izakhi ezingalawula futhi ziguqule ezinye izici ezibonakalayo ze-laser, kodwa ezifuna ukwethula ngokugcwele imikhiqizo ethile yemoduli ye-laser, i-athikili kuphela ekude ngokwanele. Ngakho-ke, okokuqala, gxila ku-intensity modulator. I-intensity modulator njengohlobo lwemodulator esetshenziswa kabanzi kuzo zonke izinhlobo zezinhlelo ze-optical, ukuhlukahluka kwayo, ukusebenza okuhlukile kungachazwa njengokuyinkimbinkimbi, namuhla ukukwethula uhlelo olune olujwayelekile lwe-intensity modulator: i-mechanical scheme, i-electro-optic scheme, i-acousto-optic scheme kanye ne-liquid crystal scheme.

1. I-Mechanical scheme: imoduli yamandla eyimishini iyimoduli yamandla yokuqala futhi esetshenziswa kakhulu. Umgomo uwukushintsha isilinganiso sokukhanya kuka-s kanye nokukhanya kuka-p ekukhanyeni kwe-polarized ngokuzungezisa ipuleti legagasi elinguhhafu, nokuhlukanisa ukukhanya nge-polarizer. Kusukela ekulungiseni kokuqala okwenziwa ngesandla kuya kokuzenzakalelayo kwanamuhla kakhulu nokunemba okuphezulu, izinhlobo zayo zomkhiqizo nokuthuthukiswa kohlelo lokusebenza sekuvuthwe kakhulu.

2. Uhlelo lwe-Electro-optical: i-electro-optical intensity modulator ingashintsha ukuqina noma i-amplitude yokukhanya kwe-polarized, isimiso sisekelwe kumphumela we-Pockels wamakristalu e-electro-optical. Isimo se-polarization se-polarized beam sishintsha ngemva kokusetshenziswa kwekristalu ye-electro-optic enensimu kagesi, bese i-polarization ihlukaniswa ngokukhetha yi-polarizer. Ukuqina kokukhanya okukhishiwe kungalawulwa ngokushintsha ukushuba kwenkundla kagesi, futhi umkhawulo wokukhuphuka/wehla we-ns magnitude ungafinyelelwa.

3. Isikimu se-Acousto-optic: imoduli ye-acousto-optic nayo ingasetshenziswa njengemoduli yokuqina. Ngokushintsha ukusebenza kahle kwe-diffraction, amandla okukhanya okungu-0 nokukhanya okungu-1 angalawulwa ukuze kufezwe injongo yokulungisa ukukhanya kokukhanya. Isango le-Acoustooptic (i-optical attenuator) linezici zejubane lokushintshashintsha ngokushesha kanye nomkhawulo womonakalo omkhulu.

Isixazululo se-4 Liquid crystal: idivayisi yekristalu ewuketshezi ivame ukusetshenziswa njengepuleti eliguquguqukayo noma isihlungi esiguqulekayo, ngokusebenzisa i-voltage yokushayela emikhawulweni yomibili yebhokisi le-liquid crystal ukwengeza into eqondile ye-polarization, ingenziwa ibe yi-crystal shutter eyi-liquid noma i-attenuator eguquguqukayo, umkhiqizo unembobo enkulu ngokukhanya, izici ezinokwethenjelwa okuphezulu.