Kev taw qhia luv luv ntawm lasertus neeg hloov khothev naus laus zis
Laser yog ib lub nthwv dej electromagnetic siab, vim nws muaj kev sib raug zoo, zoo li cov nthwv dej electromagnetic ib txwm muaj (xws li siv hauv xov tooj cua thiab TV), ua ib lub nthwv dej nqa khoom los xa cov ntaub ntawv. Cov txheej txheem ntawm kev thauj cov ntaub ntawv rau ntawm lub laser hu ua modulation, thiab lub cuab yeej uas ua cov txheej txheem no hu ua modulator. Hauv cov txheej txheem no, lub laser ua haujlwm ua tus nqa khoom, thaum lub teeb liab qis uas xa cov ntaub ntawv hu ua modulated signal.
Kev hloov kho laser feem ntau muab faib ua kev hloov kho sab hauv thiab kev hloov kho sab nraud ob txoj kev. Kev hloov kho sab hauv: hais txog kev hloov kho hauv cov txheej txheem ntawm laser oscillation, uas yog, los ntawm kev hloov kho lub teeb liab kom hloov cov kev hloov kho oscillation ntawm laser, yog li cuam tshuam rau cov yam ntxwv ntawm cov zis ntawm laser. Muaj ob txoj kev hloov kho sab hauv: 1. Tswj ncaj qha lub zog fais fab ntawm lub laser los kho qhov muaj zog ntawm cov zis laser. Los ntawm kev siv lub teeb liab los tswj lub zog laser, lub zog tso zis laser tuaj yeem tswj tau los ntawm lub teeb liab. 2. Cov ntsiab lus hloov kho tau muab tso rau hauv lub resonator, thiab cov yam ntxwv ntawm cov ntsiab lus hloov kho no tau tswj los ntawm lub teeb liab, thiab tom qab ntawd cov kev hloov kho ntawm lub resonator tau hloov kho kom ua tiav kev hloov kho ntawm cov zis laser. Qhov zoo ntawm kev hloov kho sab hauv yog tias kev ua haujlwm hloov kho siab, tab sis qhov tsis zoo yog tias vim tias lub modulator nyob hauv qhov khoob, nws yuav ua rau kom poob hauv qhov khoob, txo lub zog tso zis, thiab bandwidth ntawm lub modulator kuj tseem yuav raug txwv los ntawm passband ntawm lub resonator. Kev hloov kho sab nraud: txhais tau tias tom qab tsim lub laser, lub modulator raug tso rau ntawm txoj kev kho qhov muag sab nraud ntawm lub laser, thiab cov yam ntxwv ntawm lub modulator raug hloov pauv nrog lub teeb liab modulated, thiab 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 lub zog tso zis ntawm lub laser tsis cuam tshuam thiab bandwidth ntawm tus maub los tsis txwv los ntawm passband ntawm lub resonator. Qhov tsis zoo yog qhov ua haujlwm hloov kho qis.
Laser modulation muaj peev xwm muab faib ua amplitude modulation, frequency modulation, phase modulation thiab intensity modulation raws li nws cov khoom modulation. 1, amplitude modulation: amplitude modulation yog qhov oscillation uas qhov amplitude ntawm tus neeg nqa khoom hloov pauv nrog txoj cai ntawm lub teeb liab modulated. 2, frequency modulation: los modulate lub teeb liab los hloov qhov zaus ntawm laser oscillation. 3, phase modulation: los modulate lub teeb liab los hloov qhov theem ntawm laser oscillation laser.
Electro-optical intensity modulator
Lub hauv paus ntsiab lus ntawm electro-optic intensity modulation yog kom paub txog qhov intensity modulation raws li lub hauv paus ntsiab lus ntawm polarized lub teeb los ntawm kev siv electro-optic effect ntawm crystal. Cov electro-optical effect ntawm crystal yog hais txog qhov xwm txheej uas qhov refractive index ntawm crystal hloov pauv nyob rau hauv qhov kev ua ntawm lub zog hluav taws xob sab nraud, ua rau muaj qhov sib txawv ntawm lub teeb hla lub crystal hauv cov lus qhia polarization sib txawv, yog li ntawd lub xeev polarization ntawm lub teeb hloov pauv.
Electro-optic theem modulator
Txoj cai ntawm kev hloov kho theem electro-optical: lub kaum sab xis ntawm laser oscillation raug hloov los ntawm txoj cai ntawm kev hloov kho teeb liab.
Ntxiv rau qhov saum toj no electro-optic intensity modulation thiab electro-optic phase modulation, muaj ntau hom laser modulators, xws li transverse electro-optic modulator, electro-optic travelling wave modulator, Kerr electro-optic modulator, acousto-optic modulator, magnetooptic modulator, interference modulator thiab spatial light modulator.
Lub sijhawm tshaj tawm: Lub Yim Hli-26-2024