Acousto-optic modulator: Daim ntawv thov hauv cov txee atom txias

Acousto-optic modulatorDaim ntawv thov hauv cov txee atom txias

Raws li lub hauv paus tseem ceeb ntawm txhua qhov txuas laser fiber hauv lub txee atom txias, lubcov khoom siv fiber ntau optical acousto-optic modulatoryuav muab cov laser muaj zog ntau zaus uas ruaj khov rau lub txee atom txias. Atoms yuav nqus cov photons nrog lub zaus resonant ntawm v1. Txij li thaum lub zog ntawm photons thiab atoms yog qhov sib txawv, qhov ceev ntawm atoms yuav txo qis tom qab nqus cov photons, yog li ua tiav lub hom phiaj ntawm kev txias atoms. Laser-txias atoms, nrog rau lawv cov txiaj ntsig xws li lub sijhawm ntev probing, tshem tawm Doppler zaus hloov pauv thiab zaus hloov pauv los ntawm kev sib tsoo, thiab kev sib txuas tsis muaj zog ntawm lub teeb pom kev zoo, txhim kho qhov muaj peev xwm ntsuas qhov tseeb ntawm atomic spectra thiab tuaj yeem siv dav hauv cov moos atomic txias, txias atomic interferometers, thiab txias atomic navigation, ntawm lwm qhov chaw.

Sab hauv ntawm lub tshuab fiber ntau AOM acousto-optic modulator feem ntau muaj cov siv lead ua acousto-optic thiab lub tshuab fiber ntau collimator, thiab lwm yam. Lub teeb liab modulated ua rau lub transducer piezoelectric hauv daim ntawv ntawm lub teeb liab hluav taws xob (amplitude modulation, phase modulation lossis frequency modulation). Los ntawm kev hloov cov yam ntxwv ntawm cov tswv yim xws li zaus thiab amplitude ntawm lub teeb liab modulated, qhov zaus thiab amplitude modulation ntawm lub laser nkag tau ua tiav. Lub piezoelectric transducer hloov cov teeb liab hluav taws xob mus rau hauv cov teeb liab ultrasonic uas sib txawv hauv tib tus qauv vim yog cov nyhuv piezoelectric thiab nthuav tawm lawv hauv cov khoom siv acousto-optic. Tom qab cov ntsuas refractive ntawm cov khoom siv acousto-optic hloov pauv tas li, cov ntsuas refractive tau tsim. Thaum lub laser hla dhau lub tshuab fiber ntau collimator thiab nkag mus rau hauv cov khoom siv acousto-optic, diffraction tshwm sim. Qhov zaus ntawm lub teeb diffracted superimposes zaus ultrasonic ntawm qhov zaus laser nkag thawj zaug. Kho qhov chaw ntawm lub tshuab fiber ntau collimator kom lub tshuab fiber ntau acoust-optic modulator ua haujlwm hauv qhov xwm txheej zoo tshaj plaws. Lub sijhawm no, lub kaum sab xis ntawm lub teeb ci ntsa iab yuav tsum ua kom tau raws li Bragg diffraction mob, thiab hom diffraction yuav tsum yog Bragg diffraction. Lub sijhawm no, yuav luag tag nrho lub zog ntawm lub teeb ci ntsa iab raug xa mus rau thawj qib diffraction teeb.

Tus thawj AOM acouto-optic modulator siv rau ntawm qhov kawg ntawm lub kaw lus optical amplifier, modulating lub teeb nkag mus tas li los ntawm qhov kawg pem hauv ntej nrog cov pulses optical. Cov pulses optical modulated ces nkag mus rau hauv lub kaw lus optical amplification module rau kev ua kom muaj zog. Qhov thib obAOM acouto-optic modulatorsiv rau tom qab kawg ntawm lub tshuab ua kom pom kev zoo, thiab nws lub luag haujlwm yog cais cov suab nrov ntawm lub teeb liab optical pulse uas lub kaw lus ua kom pom kev zoo. Cov npoo pem hauv ntej thiab nraub qaum ntawm cov teeb liab pulses uas tso tawm los ntawm thawj AOM acouto-optic modulator yog faib ua ke. Tom qab nkag mus rau hauv lub tshuab ua kom pom kev zoo, vim yog qhov nce ntawm lub tshuab ua kom pom kev zoo rau ntug pem hauv ntej siab dua li qhov rau ntug tom qab ntawm lub teeb liab pulses, cov teeb liab pulses uas tau ua kom pom kev zoo yuav qhia txog qhov tshwm sim ntawm qhov tsis sib xws ntawm lub zog uas muaj zog nyob rau ntawm ntug pem hauv ntej, raws li pom hauv Daim Duab 3. Txhawm rau kom lub kaw lus tau txais cov teeb liab optical nrog kev faib ua ke ntawm ntug pem hauv ntej thiab nraub qaum, thawj AOM acouto-optic modulator yuav tsum tau txais kev hloov kho analog. Chav tswj hwm lub kaw lus kho qhov ntug nce ntawm thawj AOM acouto-optic modulator kom nce ntug nce ntawm lub teeb liab optical ntawm lub acoust-optic module thiab them rau qhov nce tsis sib xws ntawm lub tshuab ua kom pom kev zoo ntawm ntug pem hauv ntej thiab nraub qaum ntawm lub teeb liab.

Lub amplifier optical ntawm lub system tsis yog tsuas yog ua kom cov teeb liab optical pulse signal muaj txiaj ntsig xwb, tab sis kuj ua kom lub suab nrov ntawm cov pulse sequence nrov dua. Yuav kom ua tiav qhov system signal-to-noise ratio siab, qhov feature high extinction ratio ntawm cov optical fiberAOM modulatorsiv los tswj lub suab nrov ntawm qhov kawg ntawm lub amplifier, kom ntseeg tau tias lub teeb liab ntawm lub system tuaj yeem hla mus tau zoo rau qhov loj tshaj plaws thaum tiv thaiv lub suab nrov ntawm lub hauv paus nkag mus rau hauv lub sijhawm-domain acousto-optic shutter (lub sijhawm-domain pulse gate). Txoj kev digital modulation tau txais yuav, thiab lub teeb liab theem TTL siv los tswj lub qhov rooj thiab qhov tawm ntawm lub acoust-optic module kom ntseeg tau tias ntug nce ntawm lub sijhawm-domain pulse ntawm lub acoust-optic module yog lub sijhawm nce tsim ntawm cov khoom (piv txwv li, lub sijhawm nce tsawg kawg nkaus uas cov khoom tuaj yeem tau txais), thiab qhov dav ntawm lub zog nyob ntawm qhov dav ntawm lub zog ntawm lub system TTL level signal.