Department of Optics and Quantum Electronics, University of Szeged, P.O. Box 406, Szeged H-6701, Hungary.
Opt Lett. 2013 Feb 15;38(4):410-2. doi: 10.1364/OL.38.000410.
Misalignment of the stretcher-compressor stages of chirped pulse amplification (CPA) lasers can aggravate the spatiotemporal shape of ultrashort pulses. We demonstrate a simple technique for angular dispersion measurement, which offers real-time single-shot two-dimensional characterization across the entire beam profile. The accuracy of our pilot experiment approaches its current theoretical limit of 0.1 μrad/nm. Unlike the current one-dimensional techniques working in the near field, the method works in the far field; hence, it is especially appropriate for assisting the most accurate alignment of a CPA laser compressor ensuring the maximum intensity on the target.
啁啾脉冲放大（CPA）激光的 stretcher-compressor 级失准会使超短脉冲的时空形状恶化。我们演示了一种用于测量角色散的简单技术，该技术可在整个光束剖面内进行实时单次二维特性描述。我们的初步实验的精度接近其当前的 0.1 μrad/nm 理论极限。与当前在近场工作的一维技术不同，该方法在远场中工作；因此，它特别适合于辅助最精确地对准 CPA 激光压缩机，以确保在目标上获得最大强度。
