A. Khopolo ea li-laser tsa ultrafast
Hangata li-laseser tsa Ultrafast li bua ka li-laseser tse notletsoeng tse sebelisoang ho hlahisa li-pulse tse khutšoane haholo, mohlala, nako ea nako ea femtosecond kapa picosecond.Lebitso le nepahetseng haholoanyane e ka ba ultrashort pulse laser.Li-laser tsa Ultrashort pulse ke li-lasers tse notletsoeng ka mokhoa o itseng, empa phello ea ho fetoha e ka hlahisa li-pulse tsa ultrashort.
B. Mofuta oa laser ea ultrafast
1. Li-laser tsa Ti-sapphire, tseo hangata li notletsoeng ka lense ea Kerr, li ka hlahisa maqhubu a makhutšoane a ka bang 5 fs ka nako.Kakaretso ea matla a bona a tlhahiso ke li-milliwatts tse makholo a 'maloa, ka sekhahla sa ho pheta-pheta ha sekhahla sa, ho re, 80MHz le mashome a femtoseconds kapa ka tlase, le nako ea ho otla ha mashome a femtoseconds kapa ka tlase ho moo, e bakang matla a phahameng haholo.Empa li-lasers tsa titanium-sapphire li hloka ho pompa leseli ho tsoa ho li-lasers tse ling tse tala, tse etsang hore li rarahane le ho bitsa chelete e ngata.
2. Ho na le li-laser tse fapaneng tse entsoeng ka diode tse thehiloeng ho, mohlala, ytterbium-doped (crystal kapa glass) kapa chromium-doped laser crystals, tseo hangata li sebelisang SESAM passive mode-locking.Leha nako ea pulse ea lasers ea diode-pumped e se e khuts'oane joalo ka nako ea pulse ea lasers ea titanium-sapphire, li-lasers tse pumped diode li ka koahela sebaka se pharaletseng ho latela nako ea ho otla ha pelo, sekhahla sa ho pheta-pheta le matla a mahareng (sheba ka tlase) .
3. Li-laser tsa fiber tse thehiloeng holim'a likhoele tsa khalase tse nang le likarolo tse sa tloaelehang tsa lefats'e le tsona li ka notleloa ka mokhoa o sa sebetseng, mohlala, ho sebelisa polarization rotation kapa SESAM.Li na le moeli ho feta li-lasers tse ngata ho latela matla a tloaelehileng, haholo matla a holimo, empa li ka kopanngoa hamonate le li-amplifiers tsa fiber.Sengoloa se mabapi le li-laser tsa fiber tse notletsoeng se fana ka lintlha tse ling.
(4) li-laser tsa diode tse notletsoeng e ka ba lisebelisoa tsa bohlokoa kapa li-laseser tsa diode tsa kantle, 'me li ka ba tse sebetsang, tse sa sebetseng kapa tse koaletsoeng ka mokhoa o kopaneng.Ka tloaelo, li-laseser tsa diode tse notletsoeng li sebetsa ka lebelo le phahameng (likete tse 'maloa tsa megahertz) ka lebelo le leka-lekaneng la ho otla ha pelo.
Ultrafast laser oscillators e ka ba karolo ea ultrafast laser system, e ka kenyelletsang amplifier ea ultrafast (joalo ka fiber optic amplifier) ho eketsa matla a holimo le karolelano ea matla a tlhahiso.
Nako ea poso: Jun-20-2023