Isimiso sokusebenza se-modulator ye-acousto-optic

1. Isimiso sokusebenzai-modulator ye-acousto-optic
Ingqikithi ye-modulator ye-acousto-optic (I-modulator ye-AOM)yi-acousto-optic effect. Isakhiwo sayo esiyisisekelo sihlanganisa amakristalu e-acousto-optic, ama-transducer, amadivayisi okumunca, kanye nama-driver. Ukukhishwa kwesignali kagesi ngumshayeli kuguqulwa kube amagagasi e-ultrasonic yi-transducer. Lapho amagagasi e-ultrasonic esakazeka ku-acousto-optic medium, abangela izinguquko eziqhubekayo ku-medium density, akha isakhiwo esifana ne-phase grating. Lapho ukukhanya kudlula kule medium, kwenzeka i-diffraction, okufeza ukuguqulwa kwegagasi lokuthwala i-optical. Kunezinhlobo ezimbili ngokuyinhloko zezindlela ze-diffraction: i-Raman Ness diffraction kanye ne-Bragg diffraction. I-modulator ye-AOM esetshenziswa kakhulu ivame ukusebenza kumodi ye-Bragg diffraction, lapho ukukhanya kwe-incident kuba yi-incident ekhoneni elithile le-Bragg futhi ukukhanya okuphumayo kuqukethe ukukhanya kwe-zero order okungashintshiwe kanye nokukhanya kwe-first-order diffraction okune-angle ye-deflection.
2. Amapharamitha obuchwepheshe ayinhloko we-modulator ye-acousto-optic
2.1 Ukusebenza kahle kwe-diffraction kanye nokulahlekelwa kwe-modulation: kulinganisa ikhono ledivayisi lokuguqula ukukhanya kwesigameko kube ukukhanya kwe-diffract yokuqala kanye nokulahleka kwe-optical okuhambisana nakho.
2.2 I-Bragg angle: I-engeli ethile yesigameko efinyelela ukusebenza kahle kwe-diffraction okungcono kakhulu, okuhlobene nobude be-laser wavelength, imvamisa yomsakazo, kanye nesivinini somsindo ngaphakathi kwekristalu.
2.3 Amandla e-RF afanele: okungukuthi amandla okugcwala, amandla okushayela e-RF adingekayo ukuze kufezwe ukusebenza kahle okukhulu kokuphambuka. Ifomula yokubala ethile inikezwe esihlokweni.
2.4 Ukuzivumelanisa ne-angle yokuphambuka: Ukuqinisekisa ukusebenza kahle, i-angle yokuphambuka kwe-laser yesigameko idinga ukufana nezici ze-acousto-optic medium.
2.5 Ijubane lokushintshashintsha: ngokuvamile limelelwa isikhathi sokukhuphuka kokukhanya, kuye ngesikhathi sokudlulisa amaza omsindo ngomsebe, futhi kuhlobene nobubanzi bomsebe kanye nesivinini somsindo.
3. Ukusetshenziswa okuyinhloko kwama-modulators e-acousto-optic
Izicelo ezinhlanu eziyinhloko zeubuchwepheshe be-acousto-opticziyi:
3.1 I-Acousto optic Q-switch: ibekwe ngaphakathi kwe-laser cavity, ikhiqiza i-laser enamandla aphezulu ngokushintsha ngokushesha ukulahlekelwa kwe-cavity.
3.2 I-Acousto optic modulator/switch: isetshenziselwa ukushintshashintsha kwamandla noma ukulawula okusheshayo kwe-laser ngaphandle kwe-laser cavity, futhi ingasetshenziswa njenge-shutter noma i-variable attenuator.
3.3 I-Acoustic optic deflector: Ngokushintsha imvamisa yomsakazo ukuze iphambukise umsebe we-laser, kufezwa ukuskena komsebe okusheshayo, okufanelekela ukufinyelela okungahleliwe noma ukuskena okuqhubekayo.
3.4 I-Acousto optic frequency shifter: eklanyelwe ngqo ukuhambisa imvamisa ye-laser phezulu noma phansi, futhi ingafakwa e-cascaded ukuze kufezwe inhlanganisela ye-frequency shift eyinkimbinkimbi kakhulu.
3.5 Isihlungi Esilungisekayo se-Acousto optic: Isihlungi se-optical esilungisekayo se-elekthronikhi esiqinile esingakhetha ngokushesha nangokuguquguqukayo ubude be-wavelength obuthile kusuka ku-spectrum ebanziumthombo wokukhanya.