Li Zhaoyang, Li Shuai, Wang Cheng, Xu Yi, Wu Fengxiang, Li Yanyan, Leng Yuxin
Opt Express. 2015 Dec 28;23(26):33386-95. doi: 10.1364/OE.23.033386.
The fabrication of meter-sized-gratings limits the rapid development of worldwide femtosecond ultra-intense lasers with 10PW or higher peak power, and the grating tiling method is an alternative to this problem. But the unreliability and complexity of the traditional grating tiling, which has already been widely used in picosecond Petawatt lasers, challenges its application in femtosecond ultra-intense lasers for wider bandwidth and more sensitive grating attitude. In this paper, we demonstrate an experiment to compress an 800nm centered nanosecond deep-chirped-pulse to around 30fs by an object-image-grating self-tiling compressor, to the best of our knowledge, which is the shortest pulse compressed by a tiled grating compressor. Both the compression pulse and the focal spot are stable and close to the theoretical limits. We believe it is a feasible solution to the grating-size-limited problem for recent femtosecond 10PW Ti:sapphire or OPCPA laser projects.
米级光栅的制造限制了全球峰值功率为10拍瓦或更高的飞秒超强激光的快速发展，而光栅拼接方法是解决这一问题的一种替代方案。但是，传统的光栅拼接方法尽管已在皮秒拍瓦激光器中广泛应用，但其不可靠性和复杂性，对于带宽要求更高、光栅姿态更敏感的飞秒超强激光器的应用构成了挑战。在本文中，据我们所知，我们展示了一个实验，通过物像光栅自拼接压缩器将中心波长为800nm的纳秒深啁啾脉冲压缩至约30飞秒，这是通过拼接光栅压缩器压缩得到的最短脉冲。压缩脉冲和焦点光斑均稳定且接近理论极限。我们认为，对于近期的飞秒10拍瓦钛宝石或光参量啁啾脉冲放大激光器项目而言，这是解决光栅尺寸受限问题的一个可行方案。
