Demonstration of high conversion efficiency to second harmonic in a wide tuning range

✍ Scribed by Jiangfan Xia; Zhiyi Wei; Jie Zhang

• Book ID: 104159493
• Publisher: Elsevier Science
• Year: 2000
• Tongue: English
• Weight: 229 KB
• Volume: 32
• Category: Article
• ISSN: 0030-3992
• DOI: 10.1016/s0030-3992(00)00050-5

✦ Synopsis

This article discusses the second-harmonic generation (SHG) of tightly focused fs laser pulses in a BBO crystal. It was found theoretically and demonstrated experimentally that the spatial walk-o (SWO) and group-velocity dispersion (GVD) e ects can suppress the pulse distortion and gain depression of SHG due to group-velocity mismatch (GVMM), thus keeping a reasonable pulse waveform and conversion e ciency simultaneously in a relatively wide tuning range. Using this approach, the SHG e ciency of a 2 mm long BBO crystal in a re ecting focusing geometry was enhanced signiÿcantly.