Cov teb daim ntawv thov ntawm acousto-optic modulators (AOM Modulator)

Cov teb daim ntawv thov ntawm acousto-optic modulators (AOM Modulator)

Lub hauv paus ntsiab lus ntawm Acousto-optic modulator:

An acousto-optic modulator(AOM Modulator) feem ntau yog tsim los ntawm cov siv lead ua acousto-optic, transducers, cov khoom siv nqus thiab cov tsav tsheb. Cov teeb liab modulated tso tawm los ntawm tus tsav tsheb ua haujlwm rau ntawm transducer hauv daim ntawv ntawm lub teeb liab hluav taws xob thiab tom qab ntawd hloov mus rau hauv lub zog ultrasonic uas hloov pauv hauv daim ntawv ntawm lub teeb liab hluav taws xob. Thaum lub zog ultrasonic hla dhau lub zog acousto-optic, nws ua rau lub zos compression thiab elongation ntawm lub zog, tsim cov kev nyuaj siab elastic. Lub zog no hloov pauv tas li nrog lub sijhawm thiab qhov chaw, ua rau lub zog nruab nrab kom pom qhov xwm txheej ceev ceev hloov pauv, zoo ib yam li lub grating theem. Thaum lub teeb hla dhau lub zog nruab nrab no cuam tshuam los ntawm cov nthwv dej ultrasonic, qhov xwm txheej diffraction tshwm sim. Qhov xwm txheej no hu ua qhov cuam tshuam acousto-optic. Nyob rau hauv cov nyhuv ntawm lub suab thiab lub teeb, lub teeb pom kev zoo tau modulated thiab dhau los ua lub zog modulated uas "nqa" cov ntaub ntawv.

Cov ntawv thov tseem ceeb ntawm cov acousto-optic modulators:

Suab thiab lub teeb Q Switch (AOQS)

Lub acoutooptic Q-switching switch (AOQS) ua haujlwm hauv lub laser qhov thiab raug kho kom zoo

Tus nqi Q hauv qhov cavity yog siv los tsim cov lasers pulsed nrog cov pulses luv luv thiab lub zog siab tshaj plaws. AOQS feem ntau yog siv los hloov qhov poob ntawm lub teeb 0-order. Thaum lub xov tooj cua zaus tsav tsheb ntawm AOQS raug qhib, lub teeb 0-order, vim yog diffraction, tiv thaiv lub laser hauv qhov cavity los ntawm oscillating, ua rau qhov poob ntawm qhov cavity thiab thaiv cov zis laser. Thaum lub xov tooj cua zaus tsav tsheb raug kaw ib ntus, lub zog optical uas tau sau tseg hauv lub laser qhov cavity raug tso tawm hauv daim ntawv ntawm pulses, yog li tsim cov laser pulsed. Cov txheej txheem no tuaj yeem rov ua dua ntawm tus nqi tshaj 100KHz. Thaum AOQS ua haujlwm hauv lub xeev Bragg, tsuas muaj ib lub teeb diffraction xwb. hauv

Muaj ntau lub teeb diffraction thaum ua haujlwm hauv lub xeev Raman - Niss.

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

Cov khoom siv acousto-optic (AOM) feem ntau yog siv sab nraum lub laser qhov kom hloov qhov muaj zog ntawm qhov teeb meem laser (amplitude modulation AM). Qhov no tuaj yeem yog qhov yooj yim ON/OFF modulation rau kev hloov pauv sai lossis qib hloov pauv kom ua tiav qhov muaj zog modulation. Hom modulation yog txiav txim siab los ntawm hom RF tsav tsheb thiab tuaj yeem yog digital (on/off) lossis analog (sine, square wave, linear, random…). Feem ntau hais lus, RF tsav ntawm AOM txais yuav qhov zaus ruaj khov. Qhov tseem ceeb ntawmAOM Modulatoryog lub sijhawm nce/poob, uas txhais tau tias "ceev" lossis amplitude modulation bandwidth ntawm modulation. Lub sijhawm nce/poob yog proportional rau lub beam txoj kab uas hla hauv lub modulator. Yog li ntawd, txhawm rau kom tau txais lub sijhawm nce sai, lub txoj kab uas hla ntawm lub teeb laser yuav tsum tau tswj. AOM tuaj yeem siv ua lub shutter (cycling on thiab off ntawm lub zaus teem) thiab kuj yog lub attenuator hloov pauv (dynamically tswj lub zog ntawm lub teeb kis tau). Laser modulation yog ua tiav los ntawm kev tswj lub xov tooj cua zaus kom ua rau lub suab nthwv dej hauv lub acousto-optic crystal.

3. Acousto-optic deflector (AODF)

Lub acoutooptic deflector (AODF) tuaj yeem ua tiav kev luam theej duab beam excited los ntawm kev hloov pauv zaus ntawm lub xov tooj cua. Qhov chaw luam theej duab tuaj yeem yog qhov chaw random, kev luam theej duab kab tas mus li thiab kev hloov pauv ntawm cov ntsiab lus sib law liag. Raws li lub crystal, wavelength thiab qhov loj ntawm beam, lub sijhawm teb ntawm 0.05 txog 15 microseconds thiab kev tswj hwm qhov chaw meej ntawm nRad tuaj yeem ua tiav.

4. Acousto-optic zaus Shifter (AOFS)

Tom qab dhau los ntawm txhua lub cuab yeej acousto-optic, lub teeb diffraction tso zis ntawm lub teeb laser yuav tsim cov zaus hloov pauv. Lub acousto-optic zaus hloov pauv (AOFS) yog lub cuab yeej me me tsim tshwj xeeb los ua kom tiav qhov zaus hloov pauv. Nyob ntawm cov kaum sab xis sib txawv xaiv, AOFS yuav hloov qhov zaus nce lossis nqis los ntawm qhov zaus ntawm lub teeb liab zaus siv, thiab ob lossis ntau lub cuab yeej tuaj yeem ua casccascted kom ua tiav qhov sib sau ua ke lossis qhov sib txawv zaus sib xyaw. Cov khoom AOFS txais yuav cov kaum sab xis acoustic absorber tsim tshwj xeeb, uas tuaj yeem txo qhov kev cuam tshuam suab thiab txhim kho kev ua haujlwm ntawm AOFS.

5. Acousto-optic Adjustable Filter (AOTF)

Lub lim dej acousto-optic tunable (AOTF) yog lub lim dej solid-state, electronically addressed thiab random accessed optical passband filter. Nws tuaj yeem siv los xaiv cov wavelengths tshwj xeeb los ntawm broadband lossis multi-line sources sai thiab dynamically. Diffraction tshwm sim thaum cov xwm txheej sib phim tshwj xeeb tau ntsib ntawm cov acoustic beams. Yog li ntawd, nws ua tau los tswj cov kev teeb tsa lim dej electronically (xws li wavelength, modulation depth, thiab txawm tias bandwidth), yog li muab kev nkag mus sai (feem ntau yog microseconds), dynamic, thiab random rau optical filtering.