ʻElua mau ʻano hana o ka modulator acousto-optic

ʻElua mau ʻano hana omea hoʻololi ʻike maka-acousto
He mea hoʻololi acousto-optic (Mea hoʻololi AOM) he mea hana e hiki ke hoʻololi i ka ikaika a hoʻohuli paha i ke kihi o kahi kukuna laser me ka ʻole o ka pono no kekahi mau ʻāpana neʻe macroscopic. He maʻalahi kona kumumanaʻo nui: hoʻoulu i nā nalu kani i loko o kahi mea moakaka, hoʻohana i nā loli manawa o ka density i hoʻokumu ʻia e nā nalu kani e hana i kahi grating diffraction, a pēlā e hoʻololi ai i ka mālamalama e hele ana ma o ia mea.
1. Ma hope o ke komo ʻana i ka ʻāpana ʻo Prague, ʻelua mau hoʻohana kumu o ka modulator AOM:
1.1 Hoʻololi ikaika: hoʻopaʻa i ke alapine RF a hoʻololi i ka mana RF. ʻO ka loli o ka ikaika o ke kani e alakaʻi i kahi loli i ka hohonu o ka grating, a ʻo ka ikaika o ke kukui diffracted kauoha mua e loli like. ʻO ka modulation ikaika maʻalahi loa he kuapo: ke hoʻā ʻia ka RF, ʻike ʻia ke kiko kukui pae mua; pio RF, nalowale ke kiko kukui pae mua.
1.2 Ka hoʻololi ʻana o ke kukuna/scanning: ke hoʻololi nei i ke alapine RF. ʻO ka loli alapine ke kumu o ka loli ʻana o ka nalu o ke kani, a loli ke kūpaʻa grating e like me ia, e hopena ana i ka loli o ke kihi diffraction. E hoʻololi ke kukuna laser i loko o kahi laulā kihi liʻiliʻi loa. ʻO ka hana ʻana ma kēia ʻano hana e pili ana i ke kāhea ʻana no kahi deflector optical (AOD).
Hiki ke hoʻomaopopo ʻia ke ʻano o kahi modulator acousto-optic ma ke ʻano he grating diffraction programmable, kahi e hoʻohana ai i nā hōʻailona alapine lekiō e kāohi i nā nalu ultrasonic, nā nalu ultrasonic e kāohi i nā palena grating, a laila nā gratings e kāohi i ke kuhikuhi a me ka ikaika o ka laser. ʻAʻohe ona ʻāpana neʻe macroscopic a hiki ke hoʻopau i ka hoʻololi kukui, dimming, a me ka scan ʻana i nā kihi liʻiliʻi i nā wikiwiki kiʻekiʻe loa. ʻOiai ke kiʻekiʻe o ke kumukūʻai a ua kaupalena ʻia ka laulā deflection, ʻaʻohe hopena ʻē aʻe maikaʻi aʻe ma ke ala o ka kaohi kukui wikiwiki loa.
ʻO nā pono o ka modulator AOM he wikiwiki wikiwiki, ʻaʻohe ʻaʻahu, a me ke kiko kiʻekiʻe, akā ʻaʻole ia i pani piha i nā hoʻonā mechanical. He pololei loa ke kumu: he paʻakikī ke ʻano, he kiʻekiʻe ke kumukūʻai, he liʻiliʻi loa ke kihi deflection, a ʻoi aku ka haʻahaʻa o ka pono holoʻokoʻa ma mua o nā ʻōnaehana mechanical e like me nā aniani a me nā motika. No laila, i nā kūlana kahi i kiʻekiʻe ʻole ai nā koi wikiwiki, ʻoi aku ka maikaʻi o ka deflection mechanical. Aia wale nō i ka wā e hiki ai ka wikiwiki modulation i MHz a i ʻole ma luna a ʻaʻole hiki i ke ʻano mechanical ke mālama, hikinā mea hana acousto-opticʻoiaʻiʻo ʻaʻole hiki ke pani ʻia.