In laser Compton scattering systems, the limitation to higher average brightness is the low repetition rate of high-power lasers. We propose and demonstrate for the first time, as far as we know, a simple method by which x-ray yield could be enhanced nearly 2 orders of magnitude per second. The method, utilizing cholesteric liquid crystals as the entrance mirror of the laser storage cavity, can be used not only for storing femtosecond laser pulses with a peak power of several terawatts, but also to make high coupling efficiency and energy utilization efficiency accessible.
© 2010 Optical Society of America
Original Manuscript: December 1, 2009
Revised Manuscript: March 6, 2010
Manuscript Accepted: March 15, 2010
Published: April 23, 2010
Xin Hao, Qi-hua Zhu, Ying Zhang, Wan-qing Huang, Yuan-chao Geng, Xiao Wang, and Xiao-dong Wang, "Terawatt femtosecond laser storage cavity with cholesteric liquid crystals for an x-ray source based on Compton scattering," Opt. Lett. 35, 1361-1363 (2010)