Compact high gain double-pass optical parametric chirped pulse amplifier X. L. Li, H. J. Liu, H. Y. Wang, W. Zhao, Y. S. Wang and S. X. Shi Eur. Phys. J. D, 47 2 (2008) 309-312 Published online: 16 January 2008 DOI: 10.1140/epjd/e2008-00007-5