Author Affiliations
Abstract
1 Chinese Academy of Sciences, Shanghai Institute of Optics and Fine Mechanics, State Key Laboratory of High Field Laser Physics, Shanghai, China
2 Zhangjiang Laboratory, Shanghai, China
3 Chinese Academy of Sciences, Xi’an Institute of Optics and Precision Mechanics, Center for Attosecond Science and Technology, Xi’an, China
4 ShanghaiTech University, Shanghai, China
After reaching a world record of 10 PW, the peak power development of the titanium-sapphire (Ti:sapphire) PW ultraintense lasers has hit a bottleneck, and it seems to be difficult to continue increasing due to the difficulty of manufacturing larger Ti:sapphire crystals and the limitation of parasitic lasing that can consume stored pump energy. Unlike coherent beam combining, coherent Ti:sapphire tiling is a viable solution for expanding Ti:sapphire crystal sizes, truncating transverse amplified spontaneous emission, suppressing parasitic lasing, and, importantly, not requiring complex space-time tiling control. A theoretical analysis of the above features and an experimental demonstration of high-quality laser amplification are reported. The results show that the addition of a 2 × 2 tiled Ti:sapphire amplifier to today’s 10 PW ultraintense laser is a viable technique to break the 10 PW limit and directly increase the highest peak power recorded by a factor of 4, further approaching the exawatt class.
petawatt exawatt titanium-sapphire laser transverse amplified spontaneous emission parasitic lasing coherent crystal tiling Advanced Photonics Nexus
2023, 2(6): 066009
1 中国原子能科学研究院,北京 102413
2 日本原子力所光量子研究中心,京都619-0215 日本
介绍了目前世界上在建的第一台掺钛蓝宝石激光系统中大口径晶体内横向寄生振荡的抑制方法.采用一种掺炭的热塑料MeltMount 1.704作为折射率匹配材料,掺入炭粉作为吸收体.理论上它可以将晶体中的寄生振荡阈值从13增加到2100.
掺钛蓝宝石晶体 寄生振荡 折射率匹配 Ti: sapphire laser parasitic lasing index matching
