Daim ntawv thov teb 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 acousto-optic crystals, transducers, nqus cov khoom siv thiab cov tsav tsheb. Modulated teeb liab tso zis los ntawm tus neeg tsav tsheb ua rau ntawm lub transducer nyob rau hauv daim ntawv ntawm ib tug hluav taws xob teeb liab thiab ces hloov mus rau hauv ib tug ultrasonic yoj uas txawv nyob rau hauv daim ntawv ntawm ib tug hluav taws xob teeb liab. Thaum lub ultrasonic nthwv dej dhau los ntawm acousto-optic nruab nrab, nws ua rau lub zos compression thiab elongation ntawm nruab nrab, tsim elastic strain. Cov kab mob no hloov ib ntus nrog lub sijhawm thiab qhov chaw, ua rau qhov nruab nrab tuaj yeem nthuav tawm qhov sib txawv ntawm qhov ntom ntom, zoo ib yam li theem grating. Thaum lub teeb dhau los ntawm qhov nruab nrab no cuam tshuam los ntawm ultrasonic tsis, qhov tshwm sim diffraction tshwm sim. Qhov tshwm sim no hu ua acousto-optic nyhuv. Nyob rau hauv cov nyhuv ntawm lub suab thiab lub teeb, lub optical carrier yog modulated thiab dhau los ua ib tug modulated nthwv dej uas "nqa" cov ntaub ntawv.
Cov kev siv tseem ceeb ntawm acousto-optic modulators:
Suab thiab lub teeb Q Hloov (AOQS)
Lub acoutooptic Q-switching hloov (AOQS) ua haujlwm nyob rau hauv lub laser kab noj hniav thiab nquag hloov kho
Q tus nqi hauv kab noj hniav yog siv los tsim cov lasers nrog cov pulses luv luv thiab lub zog siab. AOQS feem ntau yog siv los hloov kho qhov poob ntawm 0-txiav beam. Thaum lub xov tooj cua zaus tsav tsheb ntawm AOQS qhib, lub teeb 0-txiav txim siab, vim yog qhov sib txawv, tiv thaiv lub laser hauv kab noj hniav los ntawm oscillating, ua rau cov kab noj hniav poob thiab thaiv cov laser tawm. Thaum lub xov tooj cua zaus tsav tsheb luv luv, cov khoom siv kho qhov muag nyob rau hauv lub laser kab noj hniav yog emissions nyob rau hauv daim ntawv ntawm pulses, li no generating pulsed laser. Cov txheej txheem no tuaj yeem rov ua dua ntawm tus nqi siab tshaj 100KHz. Thaum AOQS ua haujlwm nyob rau hauv lub xeev Bragg, tsuas muaj ib lub teeb diffraction xwb. hauv
Muaj ntau txoj kab sib txawv thaum ua haujlwm hauv Raman - Niss xeev.
2. Acousto-optic Modulator / Hloov (AOM Modulator)
Acousto-optic modulators (AOM) feem ntau yog siv sab nraum lub laser kab noj hniav los hloov qhov kev siv ntawm qhov teeb meem laser (amplitude modulation AM). Qhov no tuaj yeem yog qhov yooj yim ON / OFF kev hloov pauv rau kev hloov pauv sai lossis hloov pauv qib hloov pauv kom ua tiav kev siv zog siv. Hom kev hloov kho yog txiav txim siab los ntawm hom RF tsav tsheb thiab tuaj yeem ua digital (on / off) lossis analog (sine, square yoj, linear, random ...). Feem ntau hais lus, RF tsav ntawm AOM txais yuav ib lub sijhawm ruaj khov. Qhov tseem ceeb parameter ntawmAWM Modulatoryog lub sijhawm nce / caij nplooj zeeg, uas txhais tau tias "ceev" lossis amplitude modulation bandwidth ntawm kev hloov kho. Lub sij hawm nce / caij nplooj zeeg yog proportional rau lub beam txoj kab uas hla nyob rau hauv lub modulator. Yog li ntawd, txhawm rau kom tau txais lub sijhawm nce nrawm, txoj kab uas hla ntawm qhov teeb meem laser beam yuav tsum tau tswj. AOM tuaj yeem siv los ua lub kaw lus (lub voj voog rau thiab tawm ntawm lub sijhawm teeb tsa) thiab kuj yog qhov sib txawv ntawm qhov attenuator (dynamically tswj qhov siv ntawm lub teeb kis). Laser modulation yog ua tiav los ntawm kev tswj lub xov tooj cua zaus ua suab tsis nyob rau hauv lub acousto-optic siv lead ua.
3. Acousto-optic deflector (AODF)
Lub acoutooptic deflector (AODF) tuaj yeem ua tau zoo siab beam scanning los ntawm kev hloov lub xov tooj cua zaus tsav zaus. Lub scanning txoj hauj lwm yuav yog random txoj hauj lwm, nruam kab scanning thiab sequential point deflection. Raws li cov siv lead ua, wavelength thiab beam loj, lub sij hawm teb ntawm 0.05 mus rau 15 microseconds thiab meej txoj hauj lwm tswj ntawm nRad tuaj yeem ua tiav.
4. Acousto-optic zaus Shifter (AOFS)
Tom qab dhau los ntawm tag nrho cov khoom siv acousto-optic, lub teeb pom kev sib txawv ntawm lub laser beam yuav ua rau muaj kev hloov pauv ntau zaus. Lub acousto-optic zaus shifter (AOFS) yog ib qho khoom siv compact tshwj xeeb tsim los ua kom muaj kev hloov pauv zaus. Nyob ntawm qhov sib txawv ntawm qhov xwm txheej xaiv, AOFS yuav hloov qhov zaus nce lossis nqis los ntawm qhov zaus ntawm lub xov tooj cua zaus teeb liab, thiab ob lossis ntau lub cuab yeej tuaj yeem raug kaw kom ua tiav cov lej lossis qhov sib txawv zaus sib txuas. AOFS cov khoom siv tshwj xeeb tsim acoustic absorber cov ces kaum, uas tuaj yeem txo lub suab xav tau thiab txhim khu kev ua haujlwm ntawm AOFS.
5. Acousto-optic Adjustable Filter (AOTF)
Lub acousto-optic tunable lim (AOTF) yog ib qho khoom siv-xeev, siv hluav taws xob thiab nkag mus rau qhov ntsuas qhov muag nkag. Nws tuaj yeem siv tau sai thiab dynamically xaiv cov wavelengths tshwj xeeb los ntawm broadband lossis ntau kab. Diffraction tshwm sim thaum muaj kev sib txuam tshwj xeeb ntawm cov kab hluav taws xob acoustic. Yog li ntawd, nws yuav ua tau rau electronically tswj cov lim tsis (xws li wavelength, modulation qhov tob, thiab txawm bandwidth), yog li muab ceev (feem ntau microseconds), dynamic, thiab random nkag mus rau optical filtering.
Post lub sij hawm: May-26-2025