中国科学院上海光学精密机械研究所强场激光物理国家重点实验室, 上海 201800
基于蒙特卡罗光线追迹法，进一步研究了钕玻璃片状放大器三维空间聚光腔抽运分布的数值模拟。并且，结合氙灯的充放电回路及辐射光谱、放大自发辐射、以及激光脉冲受激辐射放大等相关数值计算模块，实现了片状钕玻璃放大器由储能至放大的整个过程的动态数值仿真。基于该数值模拟结果，设计研制的钕玻璃片状放大器已用于5 PW钛宝石啁啾脉冲放大器的抽运源中，其实验输出结果与数值计算结果基本一致。
激光器 片状放大器 光线追迹 钕玻璃 受激辐射放大 中国激光
2016, 43(12): 1201006
Author Affiliations
Abstract
1 State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, China
2 Centre d’Optique, Photonique et Laser (COPL) and D′epartement de physique, de g′enie physique et d’optique, Universit′e Laval, Qu′ebec, Qu′ebec G1V 0A6, Canada
We report on a systematic experimental study on the fluorescence spectra produced from a femtosecond laser filament in air under a high electric field. The electric field alone was strong enough to create corona discharge (CD). Fluorescence spectra from neutral and ionic air molecules were measured and compared with pure high-voltage CD and pure laser filamentation (FIL). Among them, high electric field assisted laser FIL produced nitrogen fluorescence more efficiently than either pure CD or pure FIL processes. The nonlinear enhancement of fluorescence from the interaction of the laser filament and corona discharging electric field resulted in a more efficient ionization along the laser filament zone, which was confirmed by the spectroscopic measurement of both ionization-induced fluorescence and plasma-scattered 800 nm laser pulses. This is believed to be the key precursor process for filament-guided discharge.2011CB808103), the Chinese Academy of Sciences and the State Key Laboratory of High Field Laser Physics, the 100 Talents Program of Chinese Academy of Sciences, and theShanghai Pujiang Program.
femtosecond laser filamentation femtosecond laser filamentation filament induced fluorescence spectroscopy filament induced fluorescence spectroscopy laser guided discharges laser guided discharges High Power Laser Science and Engineering
2016, 4(1): 010000e8
Author Affiliations
Abstract
State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
We report the recent improvement on the petawatt (PW) femtosecond Ti:sapphire chirped pulse amplification (CPA) laser system at Shanghai Institute of Optics and Fine Mechanics (SIOM), Chinese Academy of Sciences. By enlarging the sizes of the pump and signal beams in the large aperture Ti:sapphire amplifiers and optimizing the whole laser system, the output laser energy before the pulse compressor is upgraded to 42.6 J. Accordingly, the peak power of the laser system exceeds 1 PW. The shot-to-shot instability of the output laser energy at about 40 J is less than ±5%.
飞秒光学 钛宝石 啁啾脉冲放大 能量稳定性 140.3280 Laser amplifiers 320.7090 Ultrafast lasers Chinese Optics Letters
2010, 8(10): 1008
Author Affiliations
Abstract
Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800
Using second-order autocorrelation conception, a novel method and instrument for accurately measuring interval between two linearly polarized ultrashort pulses with real time were presented. The experiment demonstrated that the measuring method and instrument were simple and accurate (the measurement error <5 fs). During measuring, there was no moving element resulting in dynamic measurement error.
230.0230 optical devices 120.4570 optical design of instruments 320.7100 ultrafast measurements Chinese Optics Letters
2005, 3(1): 0116
Author Affiliations
Abstract
Key Laboratory for High Intensity Optics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800
Phase-matched high-order harmonic generation in Ar gas-filled cell is investigated experimentally. We obtain phase-matched 27th order harmonic driven by a commercially available solid-state femtosecond laser system at 0.55 mJ/pulse energy level and 1-kHz repetition rate. Moreover, we find that the spatial distribution of intensity of high-order harmonics is flat-top profile other than a Gaussian one under the condition of optimized conversion efficiency in the static gas cell.
190.4160 multiharmonic generation 140.7240 UV XUV and X-ray lasers Chinese Optics Letters
2004, 2(6): 06347
Author Affiliations
Abstract
Laboratory for High Intensity Optics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800
With a tabletop hybrid Nd:YAG-Nd:glass laser as pump source, a compact optical parametric chirped pulse amplification (OPCPA) laser system with a peak output power of 16.7 TW and a pulse duration of 120 fs has been demonstrated. Chirped pulses are amplified from 50 pJ to more than 3.1 J with an energy gain of above 6×10^(10) by three LBO optical parametric amplifiers with a pump energy of 12.4 J at 532 nm. After compression, a final output of 2.0-J/120-fs pulse is obtained. To the best of our knowledge, it is the highest peak output power from an OPCPA laser so far. In addition, a practical design of 1-PWlaser system based on the technique of OPCPA is also proposed.
140.3280 laser amplifiers 190.4970 parametric oscillators and amplifiers Chinese Optics Letters
2003, 1(1): 0124
Shanghai Institute of Optics and Fine Mechanics,The Chinese Academy of Sciences, Shanghai 201800, China
Chinese Journal of Lasers B
2002, 11(1): 1
Shanghai Institute of Optics and Fine Mechanics, the Chinese Academy of Sciences, Shanghai 201800
Chinese Journal of Lasers B
1998, 7(6): 520
Shanghai Institute of Optics and Fine Mechanics, Academia Sinica, Shanghai 201800
Chinese Journal of Lasers B
1996, 5(3): 248
报道主-被动和纯被动对撞脉冲锁模Nd3+∶YAG激光器的实验研究结果.主-被动锁模激光脉宽为15ps,激光输出序列脉冲能量起伏小于±2%.被动锁模激光脉宽为12ps,序列脉冲能量起伏小于±1O%.利用腔内插入标准具,获得脉宽在15～26ps间可变的锁模激光.实验还研究了非共振环形腔的激光偏振特性.
Nd:YAG激光器 对撞脉冲锁模
