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 de...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 ×1010 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-PW laser system based on the technique of OPCPA is also proposed.展开更多
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 Science...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%.展开更多
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...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.展开更多
基金This work was partially supported by the National Key Basic Research Special Foundation of China under Grant No.G1999075200 and Chinese Academy of Sciences.
文摘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 ×1010 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-PW laser system based on the technique of OPCPA is also proposed.
基金supported by the National Basic Research Program of China (No. 2006CB806000)the National Natural Science Foundation of China (No.60921004)
文摘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%.
基金The work was supported by the National Natural Science Foundation of China (No. 69925513 and 19974058) and the Chinese National Major Basic Research Project (No. G1999075204).
文摘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.
