Hom laser modulators

Ua ntej, Kev hloov kho sab hauv thiab kev hloov kho sab nraud
Raws li kev sib raug zoo ntawm tus modulator thiab lub laser, tuskev hloov kho lasertuaj yeem muab faib ua kev hloov kho sab hauv thiab kev hloov kho sab nraud.

01 kev hloov kho sab hauv
Lub teeb liab modulation yog ua tiav hauv cov txheej txheem ntawm laser oscillation, uas yog, cov kev cai ntawm laser oscillation raug hloov pauv raws li txoj cai ntawm lub teeb liab modulation, yog li hloov cov yam ntxwv ntawm cov zis laser thiab ua tiav modulation.
(1) Tswj ncaj qha rau lub twj tso kua mis laser kom ua tiav qhov kev hloov kho ntawm qhov tso zis laser thiab seb puas muaj, yog li nws raug tswj los ntawm lub zog fais fab.
(2) Lub ntsiab lus modulation tau muab tso rau hauv lub resonator, thiab qhov kev hloov pauv ntawm cov yam ntxwv ntawm lub ntsiab lus modulation yog tswj los ntawm lub teeb liab los hloov cov kev cai ntawm lub resonator, yog li hloov cov yam ntxwv ntawm lub laser.

02 Kev hloov kho sab nraud
Kev hloov kho sab nraud yog kev sib cais ntawm laser tiam thiab kev hloov kho. Hais txog kev thauj khoom ntawm lub teeb liab modulated tom qab tsim lub laser, uas yog, lub modulator tau muab tso rau hauv txoj kev kho qhov muag sab nraud ntawm lub laser resonator.
Lub teeb liab modulation voltage ntxiv rau lub modulator kom ua rau qee yam ntxwv ntawm lub modulator theem hloov pauv, thiab thaum lub laser hla dhau nws, qee qhov parameter ntawm lub teeb nthwv dej raug modulated, yog li nqa cov ntaub ntawv kom xa mus. Yog li ntawd, kev hloov pauv sab nraud tsis yog hloov cov kev teeb tsa laser, tab sis hloov cov kev teeb tsa ntawm cov zis laser, xws li qhov muaj zog, zaus, thiab lwm yam.

Qhov thib ob,lub tshuab hloov kho laserkev faib tawm
Raws li lub tshuab ua haujlwm ntawm lub modulator, nws tuaj yeem faib ua pawgkev hloov kho hluav taws xob, acoustooptic modulation, magneto-optic modulation thiab direct modulation.

01 Kev hloov kho ncaj qha
Lub zog tsav tsheb ntawmlaser semiconductorlos yog lub teeb-emitting diode yog modulated ncaj qha los ntawm lub teeb liab hluav taws xob, yog li ntawd lub teeb tso zis yog modulated nrog qhov kev hloov pauv ntawm lub teeb liab hluav taws xob.

(1) TTL modulation hauv kev hloov kho ncaj qha
Ib lub teeb liab digital TTL ntxiv rau lub zog fais fab laser, yog li ntawd lub zog tsav laser tuaj yeem tswj tau los ntawm lub teeb liab sab nraud, thiab tom qab ntawd lub zog tso zis laser tuaj yeem tswj tau.

(2) Kev hloov kho analog hauv kev hloov kho ncaj qha
Ntxiv rau qhov muab hluav taws xob laser lub zog analog teeb liab (amplitude tsawg dua 5V arbitrary hloov pauv teeb liab nthwv dej), tuaj yeem ua rau lub teeb liab sab nraud nkag mus rau qhov sib txawv voltage sib raug rau lub laser tsav tam sim no, thiab tom qab ntawd tswj lub zog laser tso zis.

02 Kev hloov kho hluav taws xob
Kev hloov kho siv cov nyhuv electro-optic hu ua electro-optic modulation. Lub hauv paus ntawm electro-optic modulation yog cov nyhuv electro-optic, uas yog, nyob rau hauv qhov kev ua ntawm lub teb hluav taws xob siv, qhov ntsuas refractive ntawm qee cov siv lead ua yuav hloov pauv, thiab thaum lub teeb nthwv dej hla dhau qhov nruab nrab no, nws cov yam ntxwv kis tau yuav raug cuam tshuam thiab hloov pauv.

03 Kev hloov kho Acousto-optic
Lub hauv paus ntawm kev hloov kho acousto-optic yog qhov acousto-optic effect, uas yog hais txog qhov xwm txheej uas cov nthwv dej teeb pom kev zoo tau diffuse lossis tawg los ntawm lub tshav pob nthwv dej supernatural thaum nthuav dav hauv nruab nrab. Thaum lub refractive index ntawm ib qho nruab nrab hloov pauv tas li los tsim cov refractive index grating, diffraction yuav tshwm sim thaum lub nthwv dej teeb pom kev zoo nthuav dav hauv nruab nrab, thiab qhov muaj zog, zaus thiab kev coj ntawm lub teeb diffractive yuav hloov pauv nrog kev hloov pauv ntawm lub tshav pob nthwv dej supergenerated.
Kev hloov kho suab paj nruag yog ib qho txheej txheem uas siv cov nyhuv acousto-optic los thauj cov ntaub ntawv rau ntawm lub tshuab nqa zaus optical. Lub teeb liab modulated raug ua rau ntawm lub transducer electro-acoustic hauv daim ntawv ntawm lub teeb liab hluav taws xob (amplitude modulation), thiab lub teeb liab hluav taws xob sib xws raug hloov mus ua lub teb ultrasonic. Thaum lub teeb nthwv dej hla dhau lub nruab nrab acousto-optic, lub tshuab nqa optical raug modulated thiab dhau los ua nthwv dej modulated uas "nqa" cov ntaub ntawv.

04 Kev hloov kho Magneto-optical
Magneto-optic modulation yog ib qho kev siv ntawm Faraday qhov electromagnetic optical rotation effect. Thaum lub teeb nthwv dej kis mus rau hauv lub magneto-optical medium sib luag rau qhov kev taw qhia ntawm lub magnetic field, qhov tshwm sim ntawm kev tig ntawm lub dav hlau polarization ntawm lub teeb linearly polarized hu ua magnetic rotation.
Ib lub teb sib nqus tas li siv rau hauv nruab nrab kom ua tiav qhov sib nqus saturation. Qhov kev taw qhia ntawm lub voj voog sib nqus yog nyob rau hauv qhov kev taw qhia axial ntawm nruab nrab, thiab Faraday tig nyob ntawm qhov axial tam sim no sib nqus teb. Yog li ntawd, los ntawm kev tswj cov tam sim no ntawm lub kauj siab zaus thiab hloov pauv lub zog sib nqus teb ntawm lub teeb liab axial, lub kaum sab xis tig ntawm lub dav hlau kev co optical tuaj yeem tswj tau, yog li lub teeb amplitude los ntawm polarizer hloov pauv nrog qhov kev hloov pauv ntawm θ Lub kaum sab xis, yog li ua tiav kev hloov kho.