LPT-2 Txheej Txheem Ua Haujlwm rau Acousto-Optic Zoo

Kev piav qhia

Acousto-optic effect sim yog lub cim tshiab ntawm cov khoom siv hluav taws xob sim hauv cov Tsev Kawm Qib Siab thiab cov tsev kawm qib siab, yog siv los kawm cov txheej txheem lub cev hluav taws xob thiab hluav taws xob sab hauv kev sib piv hauv cov txuj ci pib hauv lub cev thiab cov kev paub txog kev ua haujlwm, thiab tseem siv rau kev tshawb fawb txog kev kho qhov muag kev sib txuas lus thiab kho qhov muag cov ntaub ntawv txheej txheem. Nws tuaj yeem pom los ntawm digital ob chav oscilloscope (Xaiv los tau).

Thaum ultrasound yoj mus ncig hauv nruab nrab, qhov nruab nrab raug ywj ywj ywj nrog qee lub sijhawm hloov chaw hauv ob lub sijhawm thiab qhov chaw, ua rau muaj kev hloov hloov zoo ib yam hauv qhov ntsuas refractive ntawm qhov nruab nrab. Raws li qhov tshwm sim, thaum txoj kab hluav taws xob dhau ntawm lub nruab nrab ntawm qhov pom ntawm ultrasound vuag hauv nruab nrab, nws tawg los ntawm nruab nrab ua yeeb yam raws li qhov kev ua kom tsis muaj zog. Qhov no yog qhov kev xav ntawm acousto-optic nyhuv.

Acousto-optic nyhuv tau faib rau cov nyhuv acousto-optic zoo thiab cov ntsiab lus tsis zoo acousto-optic. Hauv nruab nrab isotropic, lub dav hlau ntawm polarization ntawm qhov teeb meem lub teeb tsis hloov pauv los ntawm acousto-optic sib cuam tshuam (hu ua acousto-optic effect); nyob rau hauv qhov nruab nrab anisotropic, lub dav hlau ntawm polarization ntawm qhov teeb meem teeb tau hloov los ntawm acousto-optic sib cuam tshuam (hu ua anomalous acousto-optic nyhuv). Anomalous acousto-optic nyhuv muab lub hauv paus tseem ceeb rau kev tsim cov qauv ntawm acousto-optic deflectors thiab tunable acousto-optic cov ntxaij lim dej. Tsis zoo li cov txiaj ntsig acousto-optic zoo, qhov tsis zoo acousto-optic nyhuv tsis tau piav qhia los ntawm Raman-Nath diffraction. Txawm li cas los xij, los ntawm kev siv cov ntsiab lus sib txuam nrog cov ntsiab lus xws li lub zog sib txuam thiab cov sib luag hauv cov duab tsis sib haum, kev sib koom ua ke ntawm acousto-optic cuam tshuam tuaj yeem tsim los piav qhia txog ob qho tib si thiab anomalous acousto-optic cov teebmeem. Cov kev sim hauv cov txheej txheem no tsuas yog them cov txiaj ntsig acousto-optic zoo hauv isotropic tshaj tawm.

Kev Piv Txwv 

1. Soj ntsuam Bragg diffraction thiab ntsuas Bragg diffraction kaum

2. Tshaj tawm cov qauv siv acousto-optic kev sib hloov

3. Saib qhov tshwm sim acousto-optic deflection

4. Ntsuas acousto-optic diffraction efficiency thiab bandwidth

5. Ntsuas kev mus ncig ceev nrawm ntawm ultrasound yoj hauv ib nrab

6. Simulate cov kev sib txuas lus kho qhov muag siv acousto-optic tes taws los piav txheej txheem

Cov Lus Qhia Tshwj Xeeb