Yog dab tsikev hloov kho laserthev naus laus zis
Lub teeb yog ib hom nthwv dej electromagnetic uas muaj zaus siab dua. Nws muaj kev sib raug zoo heev thiab yog li, zoo li nthwv dej electromagnetic yav dhau los (xws li xov tooj cua thiab TV), tuaj yeem siv ua tus nqa khoom rau kev xa cov ntaub ntawv. Cov ntaub ntawv "nqa" los ntawm laser (xws li lus, ntawv nyeem, duab, cim, thiab lwm yam) raug xa mus rau tus txais los ntawm qee qhov kev sib kis (cua, optical fibers, thiab lwm yam), thiab tom qab ntawd txheeb xyuas thiab rov qab mus rau cov ntaub ntawv qub los ntawm tus txais optical. Cov txheej txheem ntawm kev thauj cov ntaub ntawv rau ntawm laser hu ua modulation, thiab lub cuab yeej uas ua tiav cov txheej txheem no hu ua modulator. Ntawm lawv, lub laser hu ua carrier wave; Cov ntaub ntawv qis-zaus uas ua lub luag haujlwm tswj hwm hu ua modulated signal.
Laser modulation tuaj yeem muab faib ua internal modulation thiab external modulation.
Kev hloov kho sab hauv: Nws hais txog kev thauj khoom ntawm cov teeb liab modulated thaum lub sijhawm laser oscillation txheej txheem, uas yog, siv cov teeb liab modulated los hloov cov oscillation parameters ntawm laser, yog li hloov cov yam ntxwv ntawm laser tso zis kom ua tiav kev hloov kho. Cov txheej txheem ntawm kev hloov kho sab hauv suav nrog: 1. Tswj ncaj qha rau lub zog ntawm lub twj tso zis laser kom ua tiav qhov muaj zog ntawm cov zis modulated laser. Lub zog thiab qhov muaj nyob ntawm cov zis yog txhua yam tswj los ntawm lub zog. Yog tias lub teeb liab yuav tsum tau xa mus yog siv los tswj lub zog laser, ua qhov hloov pauv tam sim no los ntawm laser tswj los ntawm lub teeb liab, ces lub laser tso tawm kuj yuav raug tswj los ntawm lub teeb liab. 2. Cov ntsiab lus modulation raug tso rau hauv lub qhov resonant, thiab cov khoom siv lub cev ntawm cov ntsiab lus modulation raug tswj los ntawm cov teeb liab kom hloov pauv, yog li hloov cov yam ntxwv ntawm lub qhov resonant thiab hloov cov yam ntxwv ntawm laser tso zis kom ua tiav kev hloov kho. Qhov zoo ntawm kev hloov kho sab hauv yog nws qhov kev ua haujlwm siab modulation. Qhov tsis zoo yog tias txij li thaum lub modulator tau muab tso rau hauv qhov chaw, nws yog sib npaug rau kev nce qhov poob hauv qhov chaw, txo cov zis hluav taws xob, thiab bandwidth ntawm lub modulator raug txwv los ntawm passband ntawm qhov chaw resonant.
Kev hloov kho sab nraud: Nws yog hais txog qhov chaw ntawm lub modulator ntawm txoj kev kho qhov muag sab nraud ntawm lub laser tom qab lub laser tsim, thiab cov yam ntxwv ntawm lub cev ntawm lub modulator raug hloov pauv los ntawm lub teeb liab hloov kho. Thaum lub laser hla dhau lub modulator, ib qho parameter ntawm lub teeb nthwv dej yuav raug hloov kho. Qhov zoo ntawm kev hloov kho sab nraud yog tias nws tsis cuam tshuam rau lub zog tso zis ntawm lub laser thiab bandwidth ntawm lub generator tsis txwv los ntawm passband ntawm lub resonant cavity. Qhov tsis zoo yog qhov ua haujlwm hloov kho qis.
Laser modulation tuaj yeem muab faib ua amplitude modulation, frequency modulation, phase modulation thiab intensity modulation, thiab lwm yam raws li nws qhov modulation. Cov modulators sib xws suav nrogcov modulators theem, cov khoom siv hloov kho qhov muaj zog, thiab lwm yam. Dhau li ntawm qhov kev hloov kho hluav taws xob thiab kev hloov kho theem hluav taws xob uas tau hais los saum toj no, Muaj ntau homcov khoom siv laser modulators, xws li transversecov khoom siv hluav taws xob-optic modulators, electro-optic travelling wave modulators, Kerr electro-optic modulators, acousto-optic modulators, magneto-optic modulators, interference modulators thiab spatial light modulators, thiab lwm yam.
Lub sijhawm tshaj tawm: Tsib Hlis-13-2025