Tsis ntev los no, xib fwb Li Zhiyuan pab neeg ntawm South China University of Technology koom tes nrog Academician Li Ruxin pab neeg ntawm Shanghai Institute of Optics thiab Mechanics, Suav Academy ntawm Sciences. Lawv tau tsim kho tshiab lub tswv yim tshiab raws li nruab nrab -infrared femtosecond laser pumping-the "synergistic nonlinear zaus nce / down conversion" txoj hauv kev-ua tiav kev txhim kho tag nrho- spectrum dawb lub teeb mem tes laser qhov chaw. Qhov no laser spans xya octaves ntawm 200 mus rau 25,000 nm, ua tiav lub zog mem tes ntawm 1 mJ, thiab nthuav tawm spectral flatness ntawm 17 dB. nrog spectral flatness ntawm 17 dB. Cov kev tshawb pom tau luam tawm nyob rau sab saum toj -tier thoob ntiaj teb optics phau ntawv xov xwm Light: Science & Applications.
Los ntawm kev hloov hluav taws xob hauv cov atoms mus rau molecular kev co ntawm cov atoms thiab cov khoom lattice vibrations, cov txheej txheem microscopic muaj ntau hom kab sib txawv xws li sib sib zog nqus ultraviolet mus rau deb -infrared. Rau ntau tshaj 60 xyoo txij li kev tsim cov lasers, cov kws tshawb fawb tau nrhiav lub laser qhov muaj peev xwm los npog tag nrho cov spectrum mus rau tib lub sijhawm saib cov microprocesses nrog ntau lub zog sib txawv. Txawm li cas los xij, cov khoom siv laser ib txwm raug kev txom nyem los ntawm kev txwv xws li nqaim spectral bandwidth, tsis muaj zog, lossis qis spectral flatness, ua tsis tau raws li cov kev cai nruj ntawm kev siv dav dav dav dav, siab mem tes siv, thiab siab spectral flatness.
Tag nrho -spectrum dawb lub teeb laser qhov chaw uas tau thov hauv txoj kev tshawb no kov yeej cov kev txwv no. Nws yog npaj rau pioneer ib tug tshiab paradigm nyob rau hauv laser spectroscopy-"single- qhov chaw puv-spectrum, synchronous snapshot"-thiab qhib tshiab frontiers nyob rau hauv siab-ceev spectrography thiab twj tso kua mis- sojntsuam ultrafast spectroscopy. Qhov kev ua tiav no tau cog lus loj heev rau kev tshawb fawb hauv physics, chemistry, cov ntaub ntawv tshawb fawb, thiab biology, nrog rau cov ntawv thov hauv biomedical imaging, kev saib xyuas ib puag ncig, thiab kev tshuaj xyuas kev lag luam.
Nonlinear Frequency Up- thiab Down-Kev Hloov Kho Synergy Pab Kom Siab -Kev Ua Haujlwm Sib Nrauj-UV mus deb-IR puv-Spectrum Dawb- Lub teeb Laser
Qhov no dawb - lub teeb laser system siv 3.9μm nruab nrab -infrared laser ua qhov chaw txuas. Los ntawm nce - hloov dua siab tshiab, luv - wavelength ciam teb yog txuas mus rau 200nm tob -ultraviolet cheeb tsam, thaum down- hloov dua siab tshiab ncua ntev -wavelength ciam teb mus rau 25μm deb{11}}infrared band. Pab neeg no tau tsim kho tshiab chirped -ib ntus -polarized lithium niobate (CPPLN) siv lead ua ib txhij tsim 2nd mus rau 12th - xaj kev sib haum xeeb. Lub upconversion module ua tiav 40% conversion efficiency nrog 1.45 mJ tso zis zog. Lub downconversion module, featuring ib cascaded LN -AGSe siv lead ua architecture, ua tiav 18% conversion efficiency nrog 0.75 mJ tso zis zog. Tag nrho cov kev qhia tshwj xeeb tseem ceeb tshaj cov uas sib piv supercontinuum laser tshuab.
Lub kaw lus photon beam siv tshaj qhov chaw hluav taws xob synchrotron los ntawm 7-8 qhov kev txiav txim ntawm qhov loj, ua rau tib lub sijhawm tshawb pom tsib cov txheej txheem physicochemical thoob plaws cov ntsuas hluav taws xob sib txawv- sib sib zog nqus ultraviolet hluav taws xob hloov pauv, pom lub teeb hluav taws xob ua kom muaj zog, nyob ze - thiab infrared 4 - thiab infrared. deb -infrared lattice vibrations-siv ib leeg laser beam lossis mem tes.
Hong Lihong, tus kws tshawb fawb tom qab kawm tiav ua ke los ntawm South China University of Technology thiab Shanghai Institute of Optics thiab Mechanics, Suav Academy ntawm Kev Tshawb Fawb, yog thawj tus sau ntawv. Li Zhiyuan, xibfwb ntawm Lub Tsev Kawm Ntawv ntawm Physics thiab Optoelectronics, South China University of Technology, thiab Academician Li Ruxin ntawm Suav Academy of Sciences yog tus kws sau ntawv sib tham. Xibfwb Li Zhiyuan tau koom nrog kev tshawb fawb, kev sim, thiab siv kev tshawb fawb hauv micro-nano photonics, nonlinear optics, laser technology, topological photonics, thiab quantum physics.
