Magawo ogwiritsira ntchito acousto-optic modulators (AOM Modulator)

Magawo ogwiritsira ntchito acousto-optic modulators (AOM Modulator)

Mfundo ya Acousto-optic modulator:

An acousto-optic modulator(AOM Modulator) nthawi zambiri imakhala ndi makristalo acousto-optic, transducers, zida zoyamwitsa ndi madalaivala. Kutulutsa kwa chizindikiro chosinthika kuchokera kwa dalaivala kumagwira ntchito pa transducer ngati chizindikiro chamagetsi ndipo kenako kumasinthidwa kukhala mafunde a ultrasonic omwe amasiyana ndi mawonekedwe amagetsi. Pamene akupanga yoweyula akudutsa acousto-mawonekedwe sing'anga, zimayambitsa m'deralo psinjika ndi elongation wa sing'anga, kupanga zotanuka kupsyinjika. Izi zimasintha nthawi ndi nthawi ndi nthawi ndi malo, zomwe zimapangitsa kuti sing'angayo iwonetsere kachulukidwe kosinthika, kofanana ndi grating ya gawo. Kuwala kukadutsa mu sing'anga iyi kusokonezedwa ndi mafunde akupanga, chodabwitsa cha diffraction chimachitika. Chodabwitsa ichi chimatchedwa acousto-optic effect. Pansi pa mphamvu ya phokoso ndi kuwala, chonyamulira cha kuwala chimasinthidwa ndikukhala mafunde osinthika omwe "amanyamula" chidziwitso.

Ntchito zazikulu za ma acousto-optic modulators:

Phokoso ndi kuwala Q Switch (AOQS)

The acoutooptic Q-switching switch (AOQS) imagwira ntchito mkati mwa laser cavity ndipo imasinthidwa mwachangu.

Mtengo wa Q pabowo umagwiritsidwa ntchito kupanga ma lasers othamanga okhala ndi ma pulse aafupi komanso mphamvu yayikulu kwambiri. AOQS nthawi zambiri imagwiritsidwa ntchito kusinthira kutayika kwa mtengo wamaoda a 0. Woyendetsa ma radio frequency a AOQS akayatsidwa, kuwala kwa 0-order, chifukwa cha kusokoneza, kumalepheretsa laser yomwe ili m'bowolo kuti isasunthike, ndikuwonjezera kutayika kwa patsekeke ndikutsekereza kutulutsa kwa laser. Pamene wailesi pafupipafupi dalaivala kuzimitsidwa mwachidule, ndi anasonkhanitsa kuwala mphamvu mu laser patsekeke zimatulutsa mu mawonekedwe a zimachitika, potero kupanga pulsed laser. Izi zitha kubwerezedwa pamlingo wopitilira 100KHz. Pamene AOQS ikugwira ntchito m'boma la Bragg, pamakhala mtengo umodzi wokha wosokoneza. mu

Pali mizati yambiri yosokoneza mukamagwira ntchito ku Raman - Niss state.

2. Acousto-optic Modulator/Switch (AOM Modulator)

Acousto-optic modulators (AOM) amagwiritsidwa ntchito kunja kwa laser patsekeke kusintha kukula kwa chochitika laser (amplitude modulation AM). Izi zitha kukhala zosavuta ON/OFF modulation kuti musinthe mwachangu kapena kusintha masinthidwe kuti mukwaniritse kusinthasintha kwamphamvu. Njira yosinthira imatsimikiziridwa ndi mtundu wa dalaivala wa RF ndipo imatha kukhala yadijito (ya / kuzimitsa) kapena analogi (sine, square wave, linear, random…). Nthawi zambiri, kuyendetsa kwa RF kwa AOM kumatenga ma frequency okhazikika. Chofunikira chachikulu chaAOM Modulatorndi nthawi yokwera / kugwa, yomwe imatanthawuza "liwiro" lomwe lingatheke kapena matalikidwe osinthika a bandwidth of modulation. Nthawi yokwera / kugwa imayenderana ndi kukula kwa mtengo mkati mwa modulator. Chifukwa chake, kuti mupeze nthawi yokwera mwachangu, makulidwe a mtengo wa laser wochitika ayenera kuwongoleredwa. AOM itha kugwiritsidwa ntchito ngati chotsekera (kupalasa njinga ndikuzimitsa pafupipafupi) komanso ngati chosinthira chosinthira (kuwongolera mphamvu ya kuwala kofalikira). Kusintha kwa laser kumatheka powongolera ma frequency a wailesi kuti apangitse mafunde amtundu wa acousto-optic crystal.

3. Acousto-optic deflector (AODF)

The acoutooptic deflector (AODF) imatha kukwaniritsa kuwunikira kosangalatsa posintha ma frequency a radio frequency drive frequency. Malo ojambulira amatha kukhala osasintha, kuyang'ana mizere mosalekeza ndi kupotoza kwa mfundo motsatizana. Kutengera kristalo, kutalika kwa mafunde ndi kukula kwa mtengo, nthawi yoyankha ya 0.05 mpaka 15 ma microseconds ndi kuwongolera kolondola kwa nRad kutha kupezedwa.

4. Acousto-optic frequency Shifter (AOFS)

Pambuyo podutsa zida zonse za acousto-optic, mtengo wa diffraction wa laser mtengo umatulutsa kusintha pafupipafupi. The acousto-optic frequency shifter (AOFS) ndi chipangizo chophatikizika chomwe chimapangidwa kuti chikwaniritse kusintha pafupipafupi. Kutengera ma angles osankhidwa osiyanasiyana, AOFS imasuntha ma frequency m'mwamba kapena pansi ndi ma frequency a siginecha yawayilesi yomwe imagwiritsidwa ntchito, ndipo zida ziwiri kapena kuposerapo zitha kudulidwa kuti zikwaniritse kuphatikiza kwa ma frequency kapena kusiyana. Zogulitsa za AOFS zimagwiritsa ntchito makona opangidwa mwapadera amacoustic absorber, omwe amatha kuchepetsa kuwunikira komanso kupititsa patsogolo mphamvu ya AOFS.

5. Sefa yosinthika ya Acousto-optic (AOTF)

Fyuluta ya acousto-optic tunable (AOTF) ndi fyuluta yowoneka bwino, yolumikizidwa pakompyuta komanso yopezeka mwachisawawa. Itha kugwiritsidwa ntchito posankha mwachangu komanso mwachangu mafunde amtundu wina kuchokera ku burodibandi kapena magwero amizere yambiri. Kusiyanitsa kumachitika pamene mikhalidwe yofananira imakwaniritsidwa pakati pa mizati yamayimbidwe. Chifukwa chake, zimakhala zotheka kuwongolera magawo azosefera pakompyuta (monga kutalika kwa mafunde, kuya kwa kusinthasintha, komanso bandwidth), potero amapereka mwachangu (nthawi zambiri ma microseconds), amphamvu, komanso mwachisawawa kupeza kusefa kwamaso.