A. Lub tswvyim ntawm ultrafast lasers
Ultrafast lasers feem ntau yog xa mus rau hom-locked lasers siv los emit ultra-luv pulses, piv txwv li, pulses ntawm femtosecond los yog picosecond ntev. Lub npe tseeb dua yuav yog ultrashort pulse laser. Ultrashort pulse lasers yog yuav luag hom-xauv lasers, tab sis qhov nce hloov pauv tuaj yeem tsim cov pulses ultrashort.
B. Hom ultrafast laser
1. Ti-sapphire lasers, feem ntau Kerr lens hom-xauv, tuaj yeem tsim cov pulses luv li ntawm 5 fs hauv lub sijhawm. Lawv qhov nruab nrab cov zis hluav taws xob feem ntau yog ob peb puas milliwatts, nrog cov mem tes rov ua dua ntawm, hais, 80MHz thiab kaum ntawm femtoseconds lossis tsawg dua, thiab lub sijhawm mem tes ntawm kaum ntawm femtoseconds lossis tsawg dua, ua rau lub zog siab kawg. Tab sis titanium-sapphire lasers yuav tsum tau siv lub teeb los ntawm qee lub teeb ntsuab lasers, uas ua rau lawv nyuaj thiab kim.
2. Muaj ntau yam diode-pumped lasers raws li, piv txwv li, ytterbium-doped (crystal los yog iav) los yog chromium-doped laser crystals, uas feem ntau yog siv SESAM passive hom-xauv. Txawm hais tias lub sijhawm mem tes ntawm diode-pumped lasers tsis yog luv luv raws li lub sijhawm mem tes ntawm titanium-sapphire lasers, diode-pumped lasers tuaj yeem npog thaj tsam thaj tsam ntawm lub sijhawm mem tes, mem tes rov qab, thiab lub zog nruab nrab (saib hauv qab) .
3. Fiber lasers raws li cov iav fibers doped nrog lub ntiaj teb tsis tshua muaj cov ntsiab lus tseem tuaj yeem raug kaw hom-xauv, piv txwv li, siv cov kev sib hloov tsis-linear polarization lossis SESAM. Lawv muaj kev txwv ntau dua li cov lasers nyob rau hauv cov nqe lus ntawm lub zog nruab nrab, tshwj xeeb tshaj yog lub zog siab, tab sis tuaj yeem yooj yim ua ke nrog fiber ntau amplifiers. Cov kab lus ntawm hom-xauv fiber ntau lasers muab cov ntsiab lus ntxiv.
(4) hom-locked diode lasers tuaj yeem yog cov khoom siv tsis sib xws lossis cov kab noj hniav sab nraud diode lasers, thiab tuaj yeem ua haujlwm, passive lossis sib xyaw hom-xauv. Feem ntau, hom-locked diode lasers ua haujlwm ntawm qhov siab (ntau txhiab megahertz) pulse repetition tus nqi ntawm lub zog me me mem tes.
Ultrafast laser oscillators tuaj yeem yog ib feem ntawm lub tshuab laser ultrafast, uas tuaj yeem suav nrog lub tshuab hluav taws xob ultrafast (xws li fiber ntau optic amplifier) kom nce siab siab thiab nruab nrab cov zis hluav taws xob.
Post lub sij hawm: Jun-20-2023