Efficient collinear frequency tripling of femtosecond laser with compensation of group velocity delay
Wang Yan-Ling(王燕玲), Zhou Xu-Gui(周绪桂), Wu Hong(吴洪), and Ding Liang-En(丁良恩)
Chin. Phys. B . 2009, (10): 4308 -4313 .  DOI: 10.1088/1674-1056/18/10/036