Author Affiliations
Abstract
1 School of Physics Science and Engineering, Tongji University, Shanghai, China
2 State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai, China
3 Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, China
4 XIOPM Center for Attosecond Science and Technology, State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an, China
The development of high-intensity ultrafast laser facilities provides the possibility to create novel physical phenomena and matter states. The timing fluctuation of the laser pulses is crucial for pump–probe experiments, which is one of the vital means to observe the ultrafast dynamics driven by intense laser pulses. In this paper, we demonstrate the timing fluctuation characterization and control of the front end of a 100-PW laser that is composed of a high-contrast optical parametric amplifier (seed) and a 200-TW optical parametric chirped pulse amplifier (preamplifier). By combining the timing jitter measurement with a feedback system, the laser seed and preamplifier are synchronized to the reference with timing fluctuations of 1.82 and 4.48 fs, respectively. The timing system will be a key prerequisite for the stable operation of 100-PW laser facilities and provide the basis for potential pump–probe experiments performed on the laser.
feedback control high-intensity ultrafast laser timing fluctuation High Power Laser Science and Engineering
2023, 11(4): 04000e52
1 中国科学院上海光学精密机械研究所,上海 201800
2 中国科学院西安光学精密机械研究所,上海 201800
中国激光
2021, 48(23): 2316003
Author Affiliations
Abstract
1 State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
2 School of Physical Science and Technology, ShanghaiTech University, Shanghai 200031, China
3 University of Chinese Academy of Sciences, Beijing 100049, China
4 CAS Center for Excellence in Ultra-intense Laser Science, Shanghai 201800, China
A novel tiled Ti:sapphire (Ti:S) amplifier was experimentally demonstrated with >1 J amplified chirped pulse output. Two Ti:S crystals having dimensions of 14 mm× 14 mm× 25 mm were tiled as the gain medium in a four-pass amplifier. Maximum output energy of 1.18 J was obtained with 2.75 J pump energy. The energy conversion efficiency of the tiled Ti:S amplifier was comparable with a single Ti:S amplifier. The laser pulse having the maximum peak power of 28 TW was obtained after the compressor. Moreover, the influence of the beam gap on the far field was discussed. This novel tiled Ti:S amplifier technique can provide a potential way for 100 PW or EW lasers in the future.
Ti:sapphire crystal tiled Ti:sapphire amplifier chirped pulse Chinese Optics Letters
2021, 19(1): 011401
对基于微纳光纤倏逝场效应气体传感器的研究进展进行了综述，同时也阐述了其原理及面临的问题。着重介绍了3 种微纳光纤气体传感器，包括直接基于微纳光纤倏逝场效应气体传感器、微纳光纤表面涂覆敏感薄膜的气体传感器和微纳光纤与其他光学微结构相结合的气体传感器。虽然，这些研究取得了一些成果，但还面临诸多问题和挑战。相信随着研究的不断深入，基于微纳光纤倏逝场效应气体传感器仍有可能凭借其独特的性能优势成为现存气体传感器的有力竞争者。
光纤光学 微纳光纤 气体传感器 倏逝场 有效穿透深度 fiber optics microfiber gas sensors evanescent field effective penetration depth 激光与光电子学进展
2015, 52(10): 100003
