Classification thiab modulation tswvyim ntawm laser modulator

Classification thiab modulation tswvyim ntawm laser modulator

Laser modulatoryog ib hom kev tswj laser Cheebtsam, nws tsis yog ib qho yooj yim raws li cov muaju, lo ntsiab muag thiab lwm yam khoom, los yog kev sib koom ua ke zoo li lasers,cov khoom siv laser, yog qib siab ntawm kev sib koom ua ke, hom thiab kev ua haujlwm ntawm cov khoom siv hauv chav kawm. Los ntawm cov lus qhia nyuaj ntawm lub teeb nthwv dej, nws tuaj yeem pom tau tias cov yam ntxwv cuam tshuam rau lub teeb nthwv dej yog kev siv A (r), theem Φ (r), zaus ω thiab plaub yam ntawm kev nthuav tawm, los ntawm kev tswj cov xwm txheej no tuaj yeem hloov lub xeev ntawm lub teeb yoj, qhov sib txuas laser modulator yogsiv zog modulator, theem modulator, zaus shifter thiab deflector.

1. Intensity modulator: siv los hloov qhov kev siv zog los yog amplitude ntawm lub laser, uas yog optical attenuators, optical rooj vag yog cov neeg sawv cev tshaj plaws, nrog rau cov khoom siv sib xyaw thiab cov khoom siv xws li lub sij hawm faib, lub zog stabilizers, suab nrov attenuators.

2. Phase modulator: siv los tswj cov theem ntawm cov nqaj, theem nce yog hu ua lag, theem qis yog hu ua txhuas. Muaj ntau hom kev hloov pauv theem, thiab lawv cov qauv kev ua haujlwm sib txawv heev, xws li photoelastic modulators, LN high-speed electro-optical phase modulators, kua siv lead ua hloov pauv theem ncua sij hawm, thiab lwm yam, yog tag nrho cov theem modulators raws li kev ua haujlwm sib txawv.

3. Frequency shifter: siv los hloov qhov zaus ntawm lub teeb nthwv dej, yog dav siv nyob rau hauv high-end laser systems lossis mapping khoom, nrog acousto-optical zaus shifter raws li ib tug neeg sawv cev.

4. Deflector: siv los hloov cov kev taw qhia ntawm beam propagation, cov pa galvanometer system yog ib qho ntawm lawv, ntxiv rau mems galvanometer ceev, electro-optical deflector thiab acousto-optical deflector.

Peb muaj lub tswv yim dav dav ntawm lub laser modulator, uas yog, cov khoom uas muaj peev xwm dynamically tswj thiab hloov ib co lub cev lub zog ntawm lub laser, tab sis xav kom tag nrho qhia cov khoom tshwj xeeb ntawm lub laser modulator, tsuas yog ib tsab xov xwm nyob deb ntawm txaus. Yog li, ua ntej ntawm tag nrho cov, tsom mus rau qhov siv zog modulator. Kev siv zog modulator yog ib hom modulator dav siv nyob rau hauv txhua hom kev kho qhov muag, nws ntau yam, qhov sib txawv ntawm qhov kev ua tau zoo tuaj yeem piav qhia raws li qhov nyuaj, hnub no los qhia koj txog plaub hom kev siv zog modulator: mechanical scheme, electro-optic scheme, acousto-optic scheme thiab kua crystal scheme.

1. Mechanical scheme: mechanical zog modulator yog qhov ntxov tshaj plaws thiab feem ntau siv zog modulator. Lub hauv paus ntsiab lus yog hloov qhov piv ntawm s lub teeb thiab p lub teeb nyob rau hauv lub teeb polarized los ntawm rotating ib nrab-yoj phaj, thiab faib lub teeb los ntawm lub polarizer. Los ntawm thawj phau ntawv hloov kho mus rau niaj hnub no lub siab automated thiab high-precision, nws cov khoom hom thiab daim ntawv thov kev loj hlob tau zoo heev.

2. Electro-optical scheme: electro-optical intensity modulator tuaj yeem hloov qhov kev siv lossis amplitude ntawm lub teeb polarized, lub hauv paus ntsiab lus yog raws li Pockels nyhuv ntawm electro-optical crystals. Lub xeev polarization ntawm cov kab hluav taws xob polarized hloov tom qab electro-optic siv lead ua siv hluav taws xob, thiab tom qab ntawd cov polarization yog xaiv los ntawm cov polarizer. Qhov kev siv ntawm lub teeb tawm tuaj yeem tswj tau los ntawm kev hloov qhov siv hluav taws xob, thiab qhov nce / poob ntug ntawm ns magnitude tuaj yeem ncav cuag.

3. Cov tswv yim acousto-optic: acousto-optic modulator kuj tseem siv tau los ua qhov kev siv zog. Los ntawm kev hloov cov diffraction efficiency, lub zog ntawm 0 lub teeb thiab 1 lub teeb tuaj yeem tswj tau kom ua tiav lub hom phiaj ntawm kev kho lub teeb siv. Acoustooptic gate (optical attenuator) muaj cov yam ntxwv ntawm kev hloov kho ceev ceev thiab kev puas tsuaj loj.

4 Cov kua siv lead ua kua: kua siv lead ua kua feem ntau yog siv los ua cov phaj yoj sib txawv lossis cov lim dej tunable, los ntawm kev siv lub tshuab hluav taws xob ntawm ob qho kawg ntawm cov kua siv lead ua lub thawv kom ntxiv cov ntsiab lus polarization, tuaj yeem ua rau hauv cov kua siv lead ua kua los yog qhov sib txawv attenuator, cov khoom muaj aperture loj los ntawm lub teeb, cov yam ntxwv muaj kev ntseeg siab.