Leseli le bonahalang la sub-20 femtosecondmohloli oa motlakase oa pulsed laser
Haufinyane tjena, sehlopha sa liphuputso se tsoang UK se phatlalalitse boithuto bo bocha, se phatlalatsa hore se atlehile ho nts'etsapele lebone le bonoang la megawatt-level sub-20 femtosecond le bonehang.mohloli oa laser ea pulsed. Mohloli ona oa pulsed laser, ultrafastlaser ea fiberSistimi e khona ho hlahisa li-pulses tse nang le maqhubu a macha, nako e khuts'oane haholo, matla a phahameng joalo ka li-nanojoules tse 39, le matla a phahameng a fetang 2 megawatts, ho bula tebello e ncha ea ts'ebeliso ea masimo a kang spectroscopy ea ultrafast, imaging biological, le ts'ebetso ea indasteri.
Ntho e ka sehloohong ea theknoloji ena ke ho kopanya mekhoa e 'meli ea ho qetela: "Gain-Managed nonlinear Amplification (GMNA)" le "Resonant Dispersive Wave (RDW) emission". Nakong e fetileng, ho fumana li-pulse tsa ultrashshort tse sebetsang hantle joalo, hangata ho ne ho hlokahala lisebelisoa tse theko e boima le tse rarahaneng tsa titanium-sapphire lasers kapa optical parametric amplifiers. Lisebelisoa tsena li ne li sa bitsa chelete e ngata feela, li le ngata, 'me ho le thata ho li hlokomela, empa li ne li boetse li lekanyelitsoe ke litekanyetso tse tlaase tsa ho pheta-pheta le mekhahlelo ea ho lokisa. Tharollo ea li-fiber tse hlahisitsoeng lekhetlong lena ha e nolofatse feela kaho ea tsamaiso empa hape e fokotsa litšenyehelo le ho rarahana haholo. E nolofalletsa tlhahiso e tobileng ea sub-20 femtosecond, e ka sebelisoang ho 400 ho ea ho 700 nanometers le ho feta matla a matla a phahameng ka lebelo le phahameng la ho pheta-pheta la 4.8 MHz. Sehlopha sa lipatlisiso se fihletse katleho ena ka meralo e hlophisitsoeng hantle ea sistimi. Taba ea pele, ba ile ba sebelisa "polarization-preserving mode-locked ytterbium fiber oscillator" e thehiloeng holim'a seipone se se nang moeli sa amplification (NALM) joalo ka mohloli oa peo. Moqapi ona ha o tiise feela botsitso ba nako e telele ea tsamaiso, empa hape o qoba bothata ba ho senyeha ha li-absorber tse tletseng 'mele. Ka mor'a ho matlafatsa le ho hatelloa ha pulse, li-pulse tsa peo li kenngoa sethaleng sa GMNA. GMNA e sebelisa mokhoa oa ho feto-fetoha ha maemo le ho ajoa ha longitudinal asymmetric ka har'a likhoele tsa optical ho fihlella ho atolosoa ha spectral le ho hlahisa li-pulse tsa ultrashort tse nang le linear chirp tse batlang li le hantle, tse qetellang li hatelloa ho sub-40 femtoseconds ka lipara tsa grating. Nakong ea sethala sa moloko oa RDW, bafuputsi ba ile ba sebelisa likhoele tse iqapetsoeng le tse entsoeng ka li-resonator tse robong tse khahlanong le resonance hollow-core. Mofuta ona oa fiber optical o na le tahlehelo e tlase haholo ka har'a sehlopha sa pompo ea pulse le sebaka sa leseli se bonahalang, se nolofalletsang matla hore a fetohe ka mokhoa o nepahetseng ho tloha pompong ho ea leqhubung le qhalakaneng le ho qoba ho kena-kenana ho bakoang ke sehlopha se phahameng sa tahlehelo ea resonant. Tlas'a maemo a nepahetseng, phallo ea matla a phallo ea matla ka tsamaiso e ka fihla ho nanojoules tse 39, bophara bo khutšoanyane ka ho fetisisa bo ka fihla ho 13 femtoseconds, matla a tlhōrō a ka ba holimo ho 2.2 megawatts, 'me matla a ho fetola matla a matla a ka ba holimo ho 13%. Ho khahlisang le ho feta ke hore ka ho lokisa likhatello tsa khase le li-parameter tsa fiber, sistimi e ka fetisetsoa habonolo ho li-ultraviolet le li-infrared bands, ho fihlela tokiso e pharaletseng ho tloha ho ultraviolet e tebileng ho isa ho infrared.
Patlisiso ena ha e na bohlokoa ba bohlokoa feela lefapheng la mantlha la li-photonics, empa hape e bula boemo bo bocha bakeng sa mafapha a indasteri le a kopo. Mohlala, mafapheng a kang ho nka litšoantšo ka microscope ea li-multi-photon, spectroscopy e rarollotsoeng ka nako e telele ka ho fetesisa, ts'ebetso ea thepa, meriana e nepahetseng, le lipatlisiso tsa morao-rao tsa optics tse sa sebetseng hantle, mofuta ona o mocha o sebetsang, o sebetsang hantle, le o theko e tlase oa mohloli o mocha oa leseli o tla fa basebelisi lisebelisoa tseo ho seng tse kileng tsa e-ba teng le ho tenyetseha. Haholo-holo maemong a hlokang litekanyetso tse phahameng tsa ho pheta-pheta, matla a tlhōrō le li-pulse tse khutšoanyane haholo, ha ho pelaelo hore theknoloji ena e na le tlhōlisano e kholoanyane 'me e na le menyetla e mengata ea ho phahamisa ha e bapisoa le mekhoa e tloaelehileng ea titanium-sapphire kapa optical parametric amplification.
Nakong e tlang, sehlopha sa lipatlisiso se rera ho ntlafatsa mokhoa ona, joalo ka ho kopanya meralo ea hajoale e nang le likarolo tse ngata tsa optical sebakeng sa mahala, kapa esita le ho sebelisa oscillator e le 'ngoe ea Mamyshev ho nka sebaka sa motsoako oa hona joale oa oscillator le amplifier, molemong oa ho fihlela miniaturization le kopanyo ea sistimi. Ho phaella moo, ka ho ikamahanya le mefuta e sa tšoaneng ea li-anti-resonance fibers, ho hlahisa likhase tse sebetsang tsa Raman le li-modules tsa makhetlo a mabeli a mabeli, tsamaiso ena e lebeletsoe hore e atolosoe ho sehlopha se pharaletseng, ho fana ka lisebelisoa tsohle tsa fiber, wideband, ultrafast laser bakeng sa masimo a mangata a kang ultraviolet, leseli le bonahalang le infrared.
Setšoantšo sa 1. Setšoantšo sa moralo oa tokiso ea laser ea pulsed
Nako ea poso: May-28-2025