Qhov tseem ceeb kev ua tau zoo characterization parameter ntawm laser system

1. Wavelength (unit: nm txog μm)

Covlaser wavelengthsawv cev rau lub wavelength ntawm lub electromagnetic yoj nqa los ntawm lub laser. Piv rau lwm hom teeb, ib qho tseem ceeb feature ntawmlaseryog tias nws yog monochromatic, uas txhais tau hais tias nws lub wavelength yog ntshiab heev thiab nws tsuas muaj ib tug zoo-txhais zaus.

Qhov txawv ntawm qhov sib txawv wavelengths ntawm laser:

Lub wavelength ntawm liab laser feem ntau yog nyob nruab nrab ntawm 630nm-680nm, thiab lub teeb emission yog liab, thiab nws kuj yog ib tug ntau tshaj laser (tseem siv nyob rau hauv lub tshav pob ntawm kev kho mob noj lub teeb, thiab lwm yam);

Lub wavelength ntawm ntsuab laser feem ntau yog hais txog 532nm, (tseem siv nyob rau hauv lub tshav pob ntawm laser, thiab lwm yam);

Blue laser wavelength feem ntau yog nruab nrab ntawm 400nm-500nm (tsuas yog siv rau kev phais laser);

Uv laser ntawm 350nm-400nm (tseem siv hauv biomedicine);

Infrared laser yog qhov tshwj xeeb tshaj plaws, raws li lub wavelength ntau thiab daim ntawv thov teb, infrared laser wavelength feem ntau nyob hauv thaj tsam ntawm 700nm-1mm. Infrared band tuaj yeem muab faib ua peb pawg: ze infrared (NIR), nruab nrab infrared (MIR) thiab deb infrared (FIR). Qhov ze-infrared wavelength ntau yog li 750nm-1400nm, uas yog siv dav hauv kev sib txuas lus fiber ntau, biomedical imaging thiab infrared night vision equipment.

2. Lub zog thiab lub zog (unit: W lossis J)

Laser zogyog siv los piav txog lub zog kho qhov muag tso zis ntawm lub nruam nthwv dej (CW) laser lossis lub zog nruab nrab ntawm lub tshuab hluav taws xob. Tsis tas li ntawd, pulse lasers yog tus cwj pwm los ntawm qhov tseeb tias lawv lub zog pulse yog proportional rau qhov nruab nrab lub zog thiab inversely proportional rau repetition rate ntawm mem tes, thiab lasers nrog lub zog siab dua thiab lub zog feem ntau tsim cov khib nyiab ntau dua.

Feem ntau cov kab teeb ci laser muaj Gaussian beam profile, yog li cov irradiance thiab flux yog ob qho tib si siab tshaj plaws ntawm lub qhov muag axis ntawm lub laser thiab txo qis raws li qhov sib txawv ntawm qhov muag axis nce. Lwm cov lasers muaj cov kab hluav taws xob tiaj tus uas, tsis zoo li Gaussian kab teeb, muaj qhov tsis tu ncua irradiance profile hla ntu ntu ntawm lub laser beam thiab kev poob qis hauv kev siv. Yog li ntawd, flat-top lasers tsis muaj peak irradiance. Lub zog siab tshaj plaws ntawm Gaussian beam yog ob npaug ntawm cov kab ncaj nraim nrog tib lub zog nruab nrab.

3. Pulse duration (unit: fs to ms)

Lub sijhawm laser pulse (piv txwv li mem tes dav) yog lub sijhawm nws siv rau lub laser kom ncav cuag ib nrab ntawm qhov siab tshaj plaws optical zog (FWHM).

 

4. Repetition tus nqi (unit: Hz rau MHz)

Repetition tus nqi ntawm amem tes laser(piv txwv li tus pulse repetition rate) piav txog cov pulses emitted ib ob, uas yog, reciprocal ntawm lub sij hawm sequence pulse spacing. Tus nqi rov qab yog inversely proportional rau lub zog mem tes thiab proportional rau nruab nrab lub zog. Txawm hais tias tus nqi rov qab feem ntau yog nyob ntawm qhov nruab nrab ntawm laser nce, hauv ntau qhov xwm txheej, tus nqi rov qab tuaj yeem hloov pauv. Qhov kev rov ua dua siab dua ua rau lub sijhawm luv luv thermal so rau saum npoo thiab qhov kawg ntawm lub laser kho qhov muag, uas ua rau cov khoom siv cua sov sai dua.

5. Divergence (ib ntus: mrad)

Txawm hais tias cov kab teeb laser feem ntau xav tias yog kev sib tsoo, lawv ib txwm muaj qee qhov sib txawv, uas piav qhia txog qhov uas cov nqaj diverges dhau qhov kev ncua deb ntawm lub duav ntawm lub laser beam vim diffraction. Hauv cov ntawv thov nrog kev ua haujlwm ntev, xws li liDAR systems, qhov twg cov khoom yuav nyob ntau pua meters deb ntawm lub laser, kev sib txawv yog qhov teeb meem tshwj xeeb.

6. Qhov loj me (unit: μm)

Qhov luaj li cas ntawm lub tsom teeb laser piav qhia txog kab teeb kab ntawm lub focal point ntawm lub teeb tsom teeb pom kev zoo. Hauv ntau daim ntawv thov, xws li cov khoom siv thiab kev phais kho mob, lub hom phiaj yog kom txo qhov chaw me me. Qhov no maximizes lub zog ceev thiab tso cai rau cov creation ntawm tshwj xeeb zoo-grained nta. Aspherical lo ntsiab muag feem ntau yog siv los hloov cov lo ntsiab muag kheej kheej los txo qhov sib txawv ntawm qhov sib txawv thiab tsim qhov me me focal me me.

7. Ua haujlwm nrug (unit: μm rau m)

Kev khiav hauj lwm deb ntawm lub tshuab laser feem ntau txhais tau tias yog lub cev nyob deb ntawm qhov kawg kho qhov muag (feem ntau yog lub lens tsom) rau cov khoom lossis qhov chaw uas lub laser tsom rau. Qee daim ntawv thov, xws li kev kho mob lasers, feem ntau nrhiav kom txo qhov kev khiav hauj lwm nyob deb, thaum lwm tus, xws li cov chaw taws teeb sensing, feem ntau tsom kom ua kom lawv qhov kev khiav hauj lwm nyob deb.