Dab tsi yog Qhov Tseem Ceeb Ntawm Cov Lasers?

CovLaser Modulesiv nyob rau hauv ntau daim ntawv thov yog txawv, yog li ntawd peb yuav tsum to taub qhov tsis ntawm lub laser, uas ncaj qha txiav txim rau cov neeg siv cov kev xaiv ntawm laser lub teeb qhov chaw. Tam sim no ntau lub teb yog inseparable ntawm daim ntawv thov ntawm laser, tshwj xeeb tshaj yog nyob rau hauv ntau lawm, kev tshawb fawb, tshuaj thiab lwm yam teb. Tsab ntawv xov xwm no txheeb tawm qee qhov tsis zoo ntawm cov pa lasers thiab muab cov lus piav qhia yooj yim, vam tias yuav pab koj nrhiav cov khoom laser zoo.

1. Laser Module tso zis zog

Lub teeb emitted los ntawmLaserslos nyob rau hauv daim ntawv ntawm lub teeb lub zog, uas, zoo li hluav taws xob hluav taws xob, yog lub zog qhov chaw. Zoo ib yam li cov zis hluav taws xob ntawm lub tshuab hluav taws xob, lub zog tso zis ntawm lub laser yog lub cev muaj nuj nqis uas ntsuas qhov tso zis ntawm lub zog laser ib chav tsev ntawm lub sijhawm. Cov units feem ntau yog milliwatts (mW), watts (W), thiab kilowatts (kW).

2. Laser Module Lub zog ruaj khov

Lub zog ruaj khov sawv cev rau qhov tsis ruaj khov ntawm lub zog hluav taws xob laser hauv qee lub sijhawm, uas feem ntau muab faib ua RMS stability thiab ncov-rau-peak stability.

RMS stability: Qhov piv ntawm lub hauv paus txhais tau tias square ntawm tag nrho cov piv txwv ntawm lub hwj chim qhov tseem ceeb rau qhov nruab nrab lub hwj chim tus nqi thaum lub sij hawm xeem lub sij hawm, piav qhia txog qhov dispersion degree ntawm cov zis hluav taws xob los ntawm qhov nruab nrab lub hwj chim tus nqi. Peak-rau-peak stability: siab tshaj plaws thiab tsawg kawg nkaus tso zis zog

Qhov feem pua ​​​​ntawm qhov sib txawv ntawm qhov tseem ceeb thiab qhov nruab nrab lub hwj chim tus nqi sawv cev rau qhov sib txawv ntawm cov zis hluav taws xob hauv ib lub sijhawm.

3. Beam Quality Factor (M² yam); Beam Parameter Khoom (BPP)

Lub beam zoo tshaj plaws yog txhais raws li qhov piv ntawm cov khoom ntawm lub duav vojvoog ntawm lub laser beam thiab deb-field divergence Lub kaum sab xis ntawm lub nqaj mus rau cov khoom ntawm lub duav vojvoog ntawm lub hom phiaj ntawm lub hom phiaj beam thiab lub divergence lub kaum sab xis ntawm qhov zoo tagnrho. hom qauv, uas yog, M2=θw/θ zoo tagnrho w zoo tagnrho. Cov kab teeb pom kev zoo yuav cuam tshuam rau cov nyhuv tsom ntawm lub laser thiab qhov chaw nyob deb, uas yog siv los qhia qhov zoo ntawm lub teeb laser. Qhov ze ntawm qhov tseeb beam zoo tshaj plaws yog rau 1, qhov ze ntawm lub beam zoo yog rau lub beam zoo tagnrho, thiab qhov zoo ntawm lub beam zoo yuav yog. Beam shapers feem ntau xav tau lub laser zoo nrog M2 tsawg dua 1.5.

Lub beam parameter khoom (BPP) yog txhais raws li cov khoom ntawm qhov deb-field divergence Lub kaum sab xis ntawm lub laser beam thiab lub vojvoog ntawm qhov nqaim tshaj plaws ntawm lub nqaj, piv txwv li BPP=θw. Nws tuaj yeem txheeb xyuas qhov loj ntawm lub laser beam thiab qib uas lub laser beam tsom mus rau qhov me me. Qhov qis dua ntawm cov khoom parameter yog, qhov zoo dua cov nqaj zoo yog. Qhov kev sib raug zoo ntawm tus nqi BPP thiab M² tus nqi yog: M² tus nqi yog tus nqi qub ntawm BPP tus nqi, rau qhov sib txawv ntawm cov kab hluav taws xob nrog ib qho wavelength normalization, uas yog, M²=BPP/BPP0, BPP0 yog tus nqi ntawm qhov sib txawv ntawm cov kab hluav taws xob ntawm qhov tshwj xeeb wavelength, thiab BPP0=λ/π.

4. Laser Module Spot (transverse hom)

Transverse hom yog txhais raws li qhov kev faib tawm ntawm thaj chaw ruaj khov ntawm ntu ntu ntu txuas mus rau kev taw qhia ntawm laser propagation. Lub laser chaw characterization yog transverse hom faib. Lub transverse hom kev faib tawm tuaj yeem simulated los ntawm qhov chaw tsom xam lossis laser profile analyzer kom tau txais qee qhov teeb meem ntawm lub laser. Cov hom kev hloov pauv feem ntau suav nrog hom kev hloov pauv yooj yim (TEM), TEM, TEM, thiab lwm yam, nrog rau lwm hom raws li pom hauv daim duab 1. TEM hom yog hais txog qhov taw tes nrog lub teeb ci ntawm 0 ntawm ntu hauv cov x kev taw qhia, thiab TEM hom yog hais txog lub ntsiab lus nrog lub teeb siv ntawm 0 ntawm ntu hauv ob qho tib si x thiab y cov lus qhia.

5. Laser Module Laser Beam Diameter

Cov txheej txheem ntsuas ntawm laser beam txoj kab uas hla muaj xws li lub qhov-qhov txoj kev, laser beam analyzer (CCD) ntsuas, riam ntug txoj kev, thiab lwm yam.

Qhov txheej txheem: Cov qauv no feem ntau tsis siv, vim tias nws nyuaj rau kev ua lub qhov thiab cov nqaj concentric hauv qhov kev sim, thiab qhov tseeb ntawm qhov kev sim tsis tuaj yeem lav tau.

Laser profile analyzer (CCD) kuaj: Qhov tseeb ntawm qhov ntsuas tau tuaj yeem lav. Cov txiaj ntsig ntawm plaub txoj kev suav rau laser beam txoj kab uas hla tau nthuav tawm hauv software interface (raws li qhia hauv daim duab 2). Txoj kev siv feem ntau txhais yog 13.5 feem pua ​​(1/e²) ntawm tus nqi siab tshaj. Tab sis txoj kev no kuj muaj qee qhov tsis xws luag, rau lub zog siab laser, CCD saturation tshwm sim, xws li siv lub attenuator, yuav ua rau lub teeb deformity.

Txoj kev Riam-ntug yog ib txoj hauv kev zoo tshaj plaws rau kev ntsuas txoj kab uas hla ntawm lub laser beam ntawm high-power laser. Siv laser nyob rau hauv kev ntsuam xyuas los ntawm cov hniav ntug lub teeb lub zog 10 feem pua ​​​​ntawm tag nrho lub hwj chim ntug txoj hauj lwm tswj ntawm x, coj laser nyob rau hauv kev ntsuam xyuas los ntawm cov hniav ntug teeb lub hwj chim 90 feem pua ​​ntawm tag nrho cov hwj chim ntug txoj hauj lwm tswj ntawm x, yuav ntsuas lub laser beam txoj kab uas hla=1.561 x|| x - x (xws li 1.561 yog haum qhov tseem ceeb).

Yog vim li cas yog vim li cas peb siv ib tug kav los yog tib neeg lub qhov muag los ntsuas lub cheeb ntawm lub laser beam ntawm pom lub teeb yog loj dua qhov ntsuas los ntawm ib tug kws laser profile analyzer, yog vim hais tias lub laser lub zog muaj zog thiab concentrated, thiab yuav muaj ib tug tej yam sib txawv. thaum lub laser ua rau cov khoom. Txawm li cas los xij, lub laser beam txoj kab uas hla ntawm qhov siab tshaj plaws (13.5 feem pua) feem ntau yog siv los ntsuas qhov tshwm sim thaum lub laser profile analyzer siv los ntsuas. Yog li qhov tshwm sim yuav me me.

6. Diffraction txwv

Ib qho khoom taw tes dhau los ntawm lub tshuab kho qhov muag tuaj yeem tau txais cov duab zoo tshaj plaws nyob rau hauv cov xwm txheej zoo tagnrho, tab sis nws tsis tuaj yeem tsim. Vim qhov kev txwv ntawm qhov sib txawv, qhov khoom taw tes no tuaj yeem tau txais daim duab Fraunhofer diffraction. Lub peev xwm ntawm kev tsom mus rau lub laser beam rau ib qho me me nyob rau hauv ib lub wavelength yog siab npaum li sai tau, uas yog, lub laser beam zoo yog qhov zoo tagnrho, thiab qhov no yog qhov kev txwv tsis pub tshaj. Lub aperture ntawm cov teeb pom kev zoo yog ncig, yog li Fraunhofer diffraction duab tsim yog qhov chaw Airy, qhov no, cov duab tsim los ntawm txhua qhov khoom taw tes yog qhov chaw diffuse, thaum ob qhov chaw nyob ze nws nyuaj rau qhov txawv, yog li txwv qhov kev daws teeb meem ntawm qhov kho qhov muag, thiab qhov chaw loj dua qhov kev daws teeb meem qis dua, qhov no yog qhov sib txawv ntawm lub teeb los ntawm kev txwv ntawm lub cev optics.

Rau lub laser beam, lub diffraction txwv qhov chaw txoj kab uas hla formula: yog d=4LλM²/πD, qhov L yog qhov chaw ua hauj lwm, λ yog lub wavelength ntawm lub laser beam, M² yog qhov zoo tshaj plaws ntawm lub laser beam, thiab D yog txoj kab uas hla ntawm lub laser beam.

7. Laser modulation

Laser modulation yog kev siv lub teeb raws li tus neeg nqa khoom, lub teeb liab thauj khoom ntawm lub teeb, raws li daim ntawv thov yuav tsum tau, thiab cov teeb liab kis tau tus mob. General modulation yog muab faib ua sab nraud modulation thiab internal modulation, sab nraud modulation yog hais txog lub laser sab nraud mechanical modulation los yog acoustic-optic modulation, internal modulation yog hais txog lub hwj chim-driven modulation thiab internal modulation yog muab faib ua TTL modulation thiab analog modulation.

TTL kev hloov kho: Thaum qhov siab thiab qis qis (0V lossis 5V) DC teeb liab ntawm qee zaus yog nkag mus rau lub laser sab nraud, lub teeb raug kaw ntawm qhov qis, thiab qhov siab-theem amplitude tsis kho. nyob rau theem siab.

Analog modulation: Lub waveform thiab amplitude ntawm lub teeb liab input tuaj yeem hloov kho dawb. Lub laser tso zis zog hloov linearly nrog cov input analog voltage teeb liab.

Cov ntaub ntawv tiv tauj:

Yog tias koj muaj lus nug, thov hu rau peb. Txawm peb cov neeg muas zaub nyob qhov twg thiab peb cov kev xav tau yog dab tsi, peb yuav ua raws li peb lub hom phiaj los muab peb cov neeg siv khoom zoo, tus nqi qis, thiab kev pabcuam zoo tshaj plaws.