Tsis ntev los no, ib pab neeg tshawb fawb sib koom ua ke ntawm Associate Researcher Meizhi Sun ntawm Kev Sib Koom Tes ntawm High Power Laser Physics, Shanghai Institute of Optical Precision thiab Mechanical Research, Suav Academy of Sciences (SIPMR) thiab Associate Researcher Xiaoniu Tu ntawm Shanghai Institute of Silicate Technology, Suav Academy ntawm Kev Tshawb Fawb (SISTR), tau tshaj tawm qhov kev teeb tsa tshiab rau XOPA (Cross-Farper Intra-cavity Optical Parametric Amplification), uas tau pom los ntawm kev sim ua qauv qhia raws li lub hauv ntej-kawg ntawm SG-II 5PW laser ntaus ntawv. Cov txiaj ntsig tau luam tawm nyob rau hauv Laser Photonics Reviews nyob rau hauv lub npe ntawm "Optical Parametric Amplification nyob rau hauv Hla Fabry-Perot Cavities".
Optical Parametric Amplification (OPA) thiab Chirped Pulse Optical Parametric Amplification (OPCPA) yog cov txheej txheem thev naus laus zis tseem ceeb tshaj plaws rau lub zog laser tshuab, thiab cov txheej txheem thev naus laus zis tseem ceeb rau kaum rau ntau pua megawatts laser tshuab yav tom ntej. Txoj kev loj hlob ntawm daim teb no tso cov kev xav tau ntawm laser amplification technology nyob rau hauv cov nqe lus ntawm efficiency, lub zog, bandwidth, nce, beam zoo, teeb liab-rau-suab nrov piv thiab shaping peev xwm.
Fig. 1 Schematic diagram of XOPA configuration
Pab neeg tshawb fawb tso cov nonlinear siv lead ua nyob rau hauv qhov hla-faus kab noj hniav, txwv lub teeb liab teeb thiab lub teeb lub teeb kom paub txog ntau qhov kev sib kis thiab lub zog hloov dua siab tshiab, tshem tawm lub teeb nyob rau hauv theem, thiab suppresses qhov sib xyaw peb-yoj lub zog reflux, thiaj li. kom paub txog monotonic extraction ntawm lub zog ntawm lub teeb liab lub teeb rau lub teeb lub teeb. Kev sim siv YCOB siv lead ua muab los ntawm Shanghai Lub Tsev Kawm Ntawv ntawm Silicate Kev Tshawb Fawb, 800nm band teeb liab lub teeb los tso lub teeb hloov pauv ntawm 56.28%, spectral dav ntawm 120nm tso zis muaj peev xwm; Tsis tas li ntawd, cov kws tshawb fawb tau tsim cov kab noj hniav tsis sib npaug ntawm ob lub Fapper kab noj hniav, kom ua tiav lub chirped pulsed teeb liab lub teeb ntawm high-contrast amplification thiab shaping. Txoj kev tshawb no qhia tau hais tias XOPA teeb tsa muaj peev xwm los tsim lub sijhawm, qhov chaw thiab zaus ntawm thaj chaw nyob rau hauv qhov chaw ntawm kev hloov pauv siab, thiab muaj feem xyuam rau txhua qhov bands thiab tag nrho cov tsis muaj kab hluav taws xob rau noncollinear optical parametric amplification, uas yog qhov tseem ceeb heev rau txhim kho cov kev ua tau zoo ntawm cov tshuab laser siab.
Fig. 2 Theoretical simulation thiab kev sim cov txiaj ntsig ntawm (a) spectral evolution thiab (b) conversion efficiency ntawm 7-pass amplification txheej txheem ntawm XOP
