LPT-2 Experimental System rau Acousto-Optic Effect Featured Image

LPT-2 Kev Sim Ua Haujlwm rau Acousto-Optic Effect

Kev Piav Qhia Luv:

Kev sim ua kom pom tseeb ntawm Acousto-optic yog ib tiam tshiab ntawm cov cuab yeej sim lub cev hauv tsev kawm qib siab thiab tsev kawm qib siab, siv los kawm txog cov txheej txheem lub cev ntawm kev sib cuam tshuam ntawm lub zog hluav taws xob thiab lub teeb hauv kev sim physics yooj yim thiab kev sim kev tshaj lij, thiab tseem siv rau kev tshawb fawb txog kev sib txuas lus optical thiab kev ua cov ntaub ntawv optical. Nws tuaj yeem pom los ntawm digital ob chav oscilloscope (Xaiv tau).

Thaum cov nthwv dej ultrasound mus ncig hauv ib qho chaw nruab nrab, qhov chaw nruab nrab raug kev nyuaj siab elastic nrog kev hloov pauv tsis tu ncua hauv ob qho tib si lub sijhawm thiab qhov chaw, ua rau muaj kev hloov pauv zoo sib xws hauv cov ntsuas refractive ntawm qhov chaw nruab nrab. Yog li ntawd, thaum lub teeb ci ntsa iab hla dhau qhov chaw nruab nrab nyob rau hauv qhov muaj cov nthwv dej ultrasound hauv qhov chaw nruab nrab, nws raug diffracted los ntawm qhov chaw nruab nrab ua lub grating theem. Qhov no yog lub tswv yim yooj yim ntawm acousto-optic effect.

Cov nyhuv acousto-optic raug faib ua cov nyhuv acousto-optic ib txwm muaj thiab cov nyhuv acousto-optic txawv. Hauv ib qho isotropic medium, lub dav hlau ntawm polarization ntawm lub teeb pom kev tsis hloov pauv los ntawm kev sib cuam tshuam acousto-optic (hu ua cov nyhuv acousto-optic ib txwm muaj); hauv ib qho anisotropic medium, lub dav hlau ntawm polarization ntawm lub teeb pom kev hloov pauv los ntawm kev sib cuam tshuam acousto-optic (hu ua cov nyhuv anomalous acousto-optic). Cov nyhuv acousto-optic txawv muab lub hauv paus tseem ceeb rau kev tsim cov deflectors acousto-optic siab heev thiab cov lim dej acousto-optic uas hloov tau. Tsis zoo li cov nyhuv acousto-optic ib txwm muaj, cov nyhuv acousto-optic txawv tsis tuaj yeem piav qhia los ntawm Raman-Nath diffraction. Txawm li cas los xij, los ntawm kev siv cov tswv yim sib cuam tshuam parametric xws li kev sib phim momentum thiab mismatching hauv nonlinear optics, ib txoj kev xav sib koom ua ke ntawm kev sib cuam tshuam acousto-optic tuaj yeem tsim los piav qhia ob qho tib si thiab cov teebmeem acousto-optic ib txwm muaj. Cov kev sim hauv lub kaw lus no tsuas yog npog cov teebmeem acousto-optic ib txwm muaj hauv isotropic media.

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Cov Khoom Qhia Txog Khoom

Cov Cim Npe Khoom

Piv txwv ntawm kev sim

1. Soj ntsuam Bragg diffraction thiab ntsuas Bragg diffraction angle

2. Tso saib cov qauv acousto-optic modulation waveform

3. Saib xyuas qhov tshwm sim ntawm acousto-optic deflection

4. Ntsuas qhov ua tau zoo ntawm acousto-optic diffraction thiab bandwidth

5. Ntsuas qhov ceev ntawm cov nthwv dej ultrasound hauv ib qho nruab nrab

6. Simulate kev sib txuas lus optical siv cov txheej txheem acousto-optic modulation

Cov Lus Qhia Tshwj Xeeb

Kev piav qhia	Cov Lus Qhia Tshwj Xeeb
He-Ne Laser Tso Tawm	<1.5mW@632.8nm
LiNbO₃Crystal	Electrode: X nto kub plated electrode flatness <λ/8@633nmTransmittance ntau yam: 420-520nm
Polarizer	Qhov qhib qhov muag Φ16mm / Qhov ntev ntawm lub teeb 400-700nm Kev kawm polarizing 99.98% Kev xa mus 30% (paraxQllel); 0.0045% (ntsug)
Ntes	PIN photocell
Lub thawv fais fab	Qhov tso zis sine wave modulation amplitude: 0-300V txuas ntxiv tunableQhov tso zis DC bias voltage: 0-600V txuas ntxiv adjustable zaus tso zis: 1kHz
Kev Teeb Pom Kev Zoo	1m, Txhuas