Tsis ntev los no, pab neeg ntawm xibfwb Zhao Yong los ntawm Northeastern University, Associate Researcher Wu Han los ntawm Sichuan University, Associate Researcher Ma Rui los ntawm Shenzhen University, thiab Xib Fwb Wang Zinan los ntawm University of Electronic Science thiab Technology ntawm Tuam Tshoj tau koom tes los piav qhia txog kev nce qib hauv pem hauv ntej. lub mechanism, yam ntxwv, thiab kev siv spectral tswj ntawm random fiber lasers. Lawv tau nkag siab txog kev tshawb fawb txog kev nce qib ntawm random fiber ntau lasers nrog siab spectral purity, nqaim band tso zis, hloov tau yooj yim wavelength tuning, thiab multi-wavelength output, luv luv daim ntawv thov ntawm random fiber lasers raws li spectral tswj, thiab tos ntsoov rau txoj kev loj hlob prospects, kev tshawb fawb. txoj kev, thiab cov teeb meem ntsib los ntawm random fiber lasers raws li spectral tswj.
Raws li ib hom tshiab ntawm random laser, random fiber ntau laser tau ib tug kev tshawb fawb hotspot tsim nyob rau hauv lub xyoo caum dhau los. Piv nrog cov tsoos fiber ntau lasers nrog ruaj resonant kab noj hniav, random fiber ntau lasers tsis xav tau meej resonant kab noj hniav kab noj hniav thiab muaj ntau dua structural kev ywj pheej. Random fiber ntau lasers muaj qhov zoo ntawm kev hloov dua siab tshiab, kev taw qhia, nqi, thiab lwm yam, thiab tuaj yeem muab lub platform zoo rau kev tsim kho ntawm ntau hom kev ua haujlwm siab lasers. Tshwj xeeb, random fiber ntau lasers raws li qhov sib txawv nce xov xwm muaj qhov ua tau zoo tshaj plaws ntawm lub wavelength thiab tuaj yeem ua tiav qhov kev txiav txim siab wavelength laser lasing hauv 1 ~ 2.1µm band. Nyob rau hauv xyoo tas los no, cov kws tshawb fawb tau ua qhov tob theoretical thiab kev sim tshawb fawb txog cov yam ntxwv ntawm random fiber ntau lasers. Los ntawm cov kev cai spectral, random fiber ntau lasers qhia lub peev xwm ntawm siab spectral purity, nqaim bandwidth thiab multi-wavelength tso zis. Tsis tas li ntawd, random fiber ntau lasers, nrog rau lawv cov cim spectral yam ntxwv, muaj dav daim ntawv thov kev cia siab nyob rau hauv fiber-optic kev sib txuas lus, fiber-optic sensing, speckle-dawb duab, supercontinuum tiam, nonlinear zaus conversion, nruab nrab-infrared laser twj tso kua mis, thiab laser- tsav inertial confinement fusion (Daim duab 1).
Kev tshawb fawb yooj yim ntawm cov yam ntxwv spectral ntawm random fiber ntau lasers
Txhawm rau theoretically piav qhia thiab txheeb xyuas cov yam ntxwv ntawm random fiber ntau lasers thiab tshawb txog lawv cov kev cai ntawm lub cev, cov kws tshawb fawb tau thov kom muaj lub zog spectrum-dependent-state equilibrium qauv, tus qauv Schrödinger nonlinear, thiab tus qauv nthwv dej dynamics kom raug ntsuas lub zog tso zis. thiab spectral hloov txheej txheem ntawm random fiber ntau lasers. Nyob rau hauv xyoo tas los no, cov kws tshawb fawb tau sim tshawb nrhiav cov spectral statistical yam ntxwv ntawm random fiber ntau lasers, qhia replica symmetry tawg mus rau hauv random fiber lasers, thiab siv statistical tsom xam txoj kev raws li spin iav txoj kev xav los tshawb txog qhov teeb meem thiab nonlinear kev sib cuam tshuam nyob rau hauv random fiber lasers.
Random fiber ntau lasers nrog zoo heev wavelength yooj
Tau txais txiaj ntsig los ntawm cov txheej txheem sib txawv, suav nrog qhov kev txiav txim thib peb uas tsis muaj txiaj ntsig tau txais txiaj ntsig (xws li txhawb nqa Raman tawg thiab txhawb nqa Brillouin tawg) thiab tsis tshua muaj ntiaj teb ion doping active nce (xws li ytterbium-, erbium-, erbium / ytterbium-, bismuth-, thiab thulium-doped active fibers), random fiber ntau lasers tuaj yeem ua haujlwm hauv 1-2.1µm band. Nyob rau hauv random fiber ntau lasers siv cov twj tso kua mis, sib txuas cov ntxaij lim dej tunable lossis wavelength-dependent point mirrors thiab hloov qhov nruab nrab wavelength ntawm cov ntxaij lim dej los yog tsom iav tuaj yeem ua tau raws li qhov sib txawv thiab muaj txiaj ntsig wavelength tuning ntau yam. Tsis tas li ntawd, los ntawm kev qhia lub wavelength-programmable point mirrors, lub spectrum ntawm random fiber ntau lasers yuav programmed thiab tsis tu ncua tuned raws li tus tsim spectral duab. Tshwj xeeb, rau cascaded random Raman fiber ntau lasers raws li broadband point mirrors thiab backscattering tawm tswv yim, lub laser wavelength yuav tsum tau tuned tsis tu ncua nyob rau hauv ib tug loj ntau yam los ntawm ncaj qha hloov lub twj tso kua mis wavelength thiab lub zog twj tso kua mis.
Spectral tswj ntawm random fiber ntau lasers
Cascaded random Raman fiber ntau lasers muaj qhov yooj yim wavelength yooj. Txawm li cas los xij, thaum lub sijhawm hloov pauv cov txheej txheem cascade, qhov seem qis qis Stokes lub teeb yuav ua rau lub purity spectral ntawm lub laser txo. Los ntawm kev txais ib hom tshiab ntawm lub sij hawm-domain ruaj khov twj tso kua mis qhov chaw (xws li incoherent broadband amplified spontaneous emission pumping, ytterbium-doped random fiber ntau laser twj, thiab linewidth broadened ib zaus laser twj), cov kws tshawb fawb tau ua tiav ntau yam cascaded random Raman fiber ntau. lasers nrog high spectral purity. Ntawm qhov tod tes, nyob rau hauv lub zog twj tso kua mis siab, cuam tshuam los ntawm nonlinear teebmeem xws li plaub-yoj sib tov thiab hla-theem kev hloov pauv hauv cov fiber ntau, cov zis spectral bandwidth ntawm lub siab qhib-cavity random fiber ntau laser feem ntau yog nyob rau hauv qhov kev txiav txim ntawm ntau nanometers. . Txhawm rau ua kom tau raws li qhov xav tau ntawm nqaim-linewidth lub teeb pom kev zoo hauv cov xwm txheej xws li kev ua haujlwm siab laser zaus ob npaug, ntsuas qhov ntsuas siab, thiab kev sib txuas lus fiber ntau, nqaim-band random fiber ntau lasers tuaj yeem ua tiav los ntawm kev ntxiv ntau lub ntsiab lus reflectors nrog adjustable spectral. cov duab thiab bandwidth mus rau lub semi-qhib kab noj hniav random fiber ntau laser qauv, los yog los ntawm kev siv sib txawv nce media (xws li stimulated Brillouin scattering) thiab txawv passive fibers (xws li polarization-tso fiber ntau, high-scattering fiber), thiab optimizing lub twj tso kua mis tswv yim. Tsis tas li ntawd, ntau lub wavelength tso zis ntawm random fiber ntau lasers tuaj yeem ua tiav los ntawm kev ntxiv spectral filtering ntsiab rau lub laser los yog siv cascaded stimulated Brillouin scattering nce.
Daim ntawv thov ntawm random fiber ntau lasers raws li spectral tswj
Cov qauv tsim thiab hloov pauv hloov pauv hloov pauv hloov pauv ntawm random fiber ntau lasers ua rau lawv tsim nyog rau kev paub txog laser lasing nyob rau hauv tshwj xeeb bands kom tau raws li cov kev xav tau ntawm daim ntaub ntawv xws li faib teeb liab amplification, siab teeb liab-rau-suab piv fiber sensing, nonlinear zaus conversion thiab nruab nrab- infrared twj tso kua mis. Nyob rau tib lub sijhawm, piv nrog fiber ntau lasers raws li cov kab noj hniav resonant, spectrally modeless random fiber ntau lasers tau raug pov thawj kom muaj lub sijhawm zoo dua qub. Yog li ntawd, random fiber ntau lasers muaj qhov zoo dua nyob rau hauv daim ntawv thov scenarios nrog siab yuav tsum tau rau laser qhov chaw stability. Tsis tas li ntawd, qhov tsis sib xws thiab spectral controllability ntawm random fiber ntau lasers pab kom lawv qhia tshwj xeeb daim ntawv thov muaj peev xwm nyob rau hauv high-kev ua tau zoo duab thiab laser-tsav inertial confinement fusion.
