Abstract:
The role of dispersion in femtosecond Ti: sapphire CPA system is theoretically analyzed. Based on the analysis, we simulate the stretch-recompress process with glass stretcher and double-prisms pairs compressor, which supply an optimized guide in the construction of CPA laser system. Compared to the grate stretcher, the positive dispersion of glass is less, but for preamplifier, the glass stretcher is more economical and with better maneuverability. Choosing appropriate glass material and changing the inserted length of prism pairs, or further adding grate pairs and chirped mirrors, the high order dispersion could be compensated and the pulse width compressed shorter.

Key words: Dispersion, Stretch, Compress