Coherently tiled Ti:sapphire laser amplification:a way to break the 10 petawatt limit on current ultraintense lasers  

作　　者：Yanqi Liu Keyang Liu Zhaoyang Li Yuxin Leng Ruxin Li 

机构地区：[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

出　　处：《Advanced Photonics Nexus》2023年第6期96-105,共10页先进光子学通讯（英文）

基　　金：supported by the National Key R&D Program of China(Grant No.2022YFA1604401);the Shanghai Science and Technology Committee Program(Grant Nos.22560780100 and 23560750200);the National Natural Science Foundation of China(Grant No.61925507).

摘　　要：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.

关 键 词：PETAWATT exawatt titanium-sapphire laser transverse amplified spontaneous emission parasitic lasing coherent crystal tiling 

分 类 号：TN2[电子电信—物理电子学]