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| 1 | Technology development for ultraintense all-OPCPA systems显示文摘Optical parametric chirped-pulse amplification(OPCPA) [Dubietis et al., Opt. Commun. 88, 437(1992)] implemented by multikilojoule Nd:glass pump lasers is a promising approach to produce ultraintense pulses(>1023 W/cm2).Technologies are being developed to upgrade the OMEGA EP Laser System with the goal to pump an optical parametric amplifier line(EP OPAL) with two of the OMEGA EP beamlines. The resulting ultraintense pulses(1.5 kJ, 20 fs,1024 W/cm2) would be used jointly with picosecond and nanosecond pulses produced by the other two beamlines. A midscale OPAL pumped by the Multi-Terawatt(MTW) laser is being constructed to produce 7.5-J, 15-fs pulses and demonstrate scalable technologies suitable for the upgrade. MTW OPAL will share a target area with the MTW laser(50 J, 1 to 100 ps), enabling several joint-shot configurations. We report on the status of the MTW OPAL system, and the technology development required for this class of all-OPCPA laser system for ultraintense pulses. | J.Bromage S.-W.Bahk I.A.Begishev C.Dorrer M.J.Guardalben B.N.Hoffman J.B.Oliver R.G.Roides E.M.Schiesser M.J.Shoup III M.Spilatro B.Webb D.Weiner J.D.Zuegel | 2019 | High Power Laser Science and Engineering2019，7，1： | 7 |
| 2 | Time amplifying techniques towards atomic time resolution显示文摘High speed imaging technology has opened applications in many fields,such as collision,detonating, high voltage discharge,disintegration and transfer of phonon and exciton in solid,photosynthesis primitive reaction,and electron dynamics inside atom shell.In principle,all of the transient processes need to be explained theoretically and,at the same time,the time amplifying technique is required for observations of these processes.The present review concerns the atomic time amplifying mechanism of optical information and the extremely-high speed imaging methods,which are expressed in terms of the short time amplifying techniques.It is well-known that for extremely-high speed imaging with the converter tube,the temporal resolution is in the order of sub-picosecond of the streak imaging,and the imaging frequency is 6×10 8 ―5×10 9 fps(frame per second)of the frame imaging.On the other hand,for the tubeless extremely-high speed imaging,the imaging frequency is 10 7 ―10 14 fps,and its mechanism of forming high speed and framing could involve a lot of factors of the light under investigation,for instance,light speed,light parallelism,the parameters of light wave such as amplitude,phase,polari- zation and wavelength,and even quantum properties of photon.In the cascaded system of electro- magnetic wave and particle wave,it is possible to simultaneously realize extremely-high resolution in time and space,which is higher than a kite resolution.Then it would be possible to break the limit of the Heisenberg uncertainty relation of the optical frequency band. | LI JingZhen Institute of Photonic Engineering,College of Electron Science&Technology,Shenzhen University,and Shenzhen Key Laboratory of Micro·Nano Photonic Information,Shenzhen 518060,China | 2009 | Science China(Technological Sciences)2009，52，12： | 5 |
| 3 | Comparative investigation on amplifying performance between 980 nm and 1480 nm pumped bismuth-based EDFA显示文摘The population rate and power propagation equations are presented and solved to compare the amplification performances of bismuth-based Er3+-doped fiber amplifier (EDFA) pumped by 980-and 1480-nm lasers,respectively.In both single signal and coarse wavelength-division-multiplexing(CWDM)signals inputs,the 1480-nm pumped bismuth-based EDFA provides a larger signal gain than the 980-nm pumped one does,whereas the latter provides a relatively lower noise figure (NF).Comparative results indicate that the 1480-nm pumping scheme is more advantageous for bismuth-based EDFA regarding the band width and gain property. | 周亚训 盖娜 陈芬 杨高波 | 2009 | 中国激光2009，36，3： | 2 |
| 4 | Experimental studies of high order soliton compression effect and gain characteristics in femtosecond laser pulses E_r^(3+)-doped fiber amplifier显示文摘Seed laser pulses with average power of 146 pW and pulse duration of 480 fs were amplified to 14.5 mW. The pulse duration was compressed to 260 fs using 6 m high concentration Er3+ -doped fiber under forward pumping. The amplified signal pulse energy was 0.691 nJ (corresponding to a peak power of 2 657.7 W) and the repetition rate was 20.84 MHz. Spectrum breakup was observed simultaneously. The spectrum of pulses amplified by 3 m Er3+ -doped fiber remains a single peak under different pump power. The amplified pulse duration was compressed abnormally with the increasing pump power using the backward pumping; that is, the amplified pulses were compressed with the increasing pump power under low pump power. When the pump power reached 38 mW, the shortest amplified pulse duration was 309 fs. With further increase in pump power, the amplified pulses began broadening, accompanied by a single peak spectrum under different pump power. | 刘东峰 陈国夫 白晋涛 王贤华 | 2000 | Science China Mathematics2000，43，3： | 1 |
| 5 | Optical Switching and Digital Signal Amplification Using an Optical Fiber Grating OBD显示文摘OpticalSwitchingandDigitalSignalAmplificationUsinganOpticalFiberGratingOBDSongQianColegeofElectronicInformation,WuhanUnivers... | Song Qian Zhang Yuancheng | 1997 | Wuhan University Journal of Natural Sciences1997，2，4： | 0 |
| 6 | Broadening of Angular Response Range With High Gain in Doped Lithium Niobate Crystals显示文摘Research on photorefractive effect grew unceasingly in the past two decades. A special application of the effect, light amplification, has drawn much attention recently. In order to improve the gain coefficient of photorefractive crystals, methods of adjusting dopants and their concentration or special techniques are adopted | 赵桦 张景文 孙万钧 许克彬 李铭华 徐玉恒 | 1994 | Chinese Science Bulletin1994，39，18： | 0 |
| 7 | Multiphoton process and optical amplification in Er^(3+)-Yb^(3+)-doped fiber pumped by Ti:Al_2O_3 tunable laser at 980-nm band显示文摘The .Er3+-Yb3+-doped fiber has a broadened absorption spectrum, which means the pumping sources can work efficiently from 810 to 1100nm. Among them 980nm is the maximum.absorption (10 dB/km) wavelength. By energy transferring and multiphoton process, the visible and ultraviolet radiation occurs when the Er3+-Yb3+-doped fiber is pumped by the laser at 980-nm band. Further researches on the mechanism of the fluorescence of Er3+-Yb3+-doped silica fiber pumped by Ti: A12O3 tunable laser at 980-nm band are helpful | 明海 孙晓泉 刘宇 董晓鹏 杨宝 谢建平 张运生 耿玉珍 | 1995 | Chinese Science Bulletin1995，40，22： | 0 |
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