Indlela yokusebenzisa i-acousto optic modulator njengeswitshi yokukhanya

Indlela yokusebenzisa i-acousto optic modulator (i-AOM modulator) njengeswitshi yokukhanya
1. Imvelaphi kunye nophuhliso lwetekhnoloji
1.1 Imvelaphi yeLaser: Ngo-1960, uTheodore Meiman wasungula ilaser yokuqala yeruby esebenzayo, ephawula ukuzalwa kwetekhnoloji yelaser.
1.2 Uphuhliso lweLaser: Emva koko, kwavela iintlobo ezahlukeneyo zeelaser, ezifana ne-gas lasers (ezifana ne-helium neon lasers), i-semiconductor laser, kunye ne-solid-state lasers (ezifana ne-YAG lasers), zandisa kancinci kancinci ububanzi bazo bokusetyenziswa kwiindawo zomkhosi, zoshishino, kunye nezonyango.
1.3 Intshayelelo yemfuneko ephambili: I-laser ifuna amandla azinzileyo, kwaye kwizicelo ezininzi, i-laser ayinakukwazi ukukhanyisa ithagethi rhoqo. Ukuze kuthintelwe ukutshintshwa okuphindaphindiweyo kwe-laser ngokwayo, kuqaliswa iswitshi yangaphandle yokukhanya ukulawula ngokuchanekileyo i-laser xa ivuliwe/icinywa.

2. Umgaqo wokusebenza we-acousto optic modulator (i-AOM modulator)
I-AOM sisixhobo sokubona esisebenzisa isiphumo se-acousto-optic, apho amaza esandi asasazeka ngesixhobo sokwenza utshintsho lwe-refractive index rhoqo, ngaloo ndlela eguqula iimpawu zamaza okukhanya adlula kwisixhobo, njengobunzulu, i-frequency, kunye necala. Okwangoku, ingqwalasela ikwiindlela ezimbini zokwahluka:
1.1 I-Bragg diffraction: Eyona ixhaphakileyo kukuba amaza okukhanya kunye nesandi enza i-engile ethile, kwaye amandla e-diffraction agxile kakhulu ekukhanyeni kwe-first-order, njenge-stereo grating. Le ndlela isetyenziswa kakhulu kwizicelo ze-optical switch.
1.2 Ukusasazwa kweRaman: Indlela yokusasazwa kwamaza okukhanya kunye nesandi ijonge ngqo, kwaye ukukhanya okusasazekayo kubonisa ukusasazwa okulinganayo kwamanqanaba amaninzi, okufana ne-planar grating.
3. Indlela yokusebenza ye-modulator ye-AOM njengeswitshi yokukhanya
3.1 I-AOM ayilayishi isignali (ayisebenzi): I-laser idlula ngqo (ukukhanya okukwinqanaba eli-0) kwaye ifunxwa sisibuko esibonakalisayo kwindlela yokukhanya, ngaphandle kokuphuma okusebenzayo.
3.2 Isignali yokulayisha ye-AOM (iyasebenza): i-diffraction iveliswa, kwaye ukukhanya kwe-first-order kukhutshwa kwi-engile ethile kwaye kungena kwindlela elandelayo ye-optical ukuze isetyenziswe.
Ngokulawula ukuba ngaba i-AOM modulator ilayisha imiqondiso, ukutshintsha ngokukhawuleza kunye nokuguqulwa kwelaser kunokufezekiswa, ukuhlangabezana neemeko zesicelo ezifuna ukulawula ixesha lokukhanyiswa kwelaser.
Ukongeza ekusetyenzisweni njengeswitshi yokukhanya, i-AOM ingasebenzisa amanqanaba ayo amabini okukhanya ukuvelisa ukuphazamiseka nokwenza imiqondiso yokubetha kwe-optical, engasetyenziswa ekulinganiseni nakwezinye iindawo. Imfuno esebenzayo yokukhupha amandla e-laser ezinzileyo ibangele ubuchwepheshe bokutshintsha kwe-optical, kwaye ii-modulators ze-acousto optic (i-AOM modulator) zisekelwe kumgaqo kunye nokusetyenziswa komsebenzi wokutshintsha kwe-optical kusetyenziswa iziphumo ze-acousto-optic, ngakumbi imo ye-Bragg diffraction.