强激光与粒子束, 2011, 23 (12): 3400, 网络出版: 2012-01-04
宽带钕玻璃激光的高效三次谐波转换
High efficiency third-harmonic generation of broadband Nd: glass laser
三次谐波转换 钕玻璃激光 组合激光模式 群速度失配 third-harmonic generation Nd: glass laser combination of lasers group-velocity mismatching
摘要
提出了一种新颖的宽频带钕玻璃激光三倍频技术——组合激光工作模式(宽带激光与窄带激光混频)方案。数值模拟研究表明: 利用窄线宽钕玻璃激光脉冲,可以缓解宽频带激光谐波转换过程中群速度失配对转换效率的影响,从而提高宽带钕玻璃激光的转换效率;并且该方案可以与目前使用成熟的双和频晶体方案结合,从而能支持目前钕玻璃激光装置能达到的最大带宽约5 nm的高效三倍频(理论上效率达约80%)。
Abstract
The paper proposes and numerically demonstrates a simple and efficient broadband frequency-tripling scheme for Nd: glass laser system based on mixing narrowband and broadband laser pulses in the sum-frequency generation(SFG) process. The group-velocity mismatching effect in the of SFG process is substantially alleviated with the assist of a narrowband laser, which is the dominant obstacle to efficient broadband third-harmonic generation. Moreover, by adding a second tripler in the SFG process, the proposed scheme will support efficient frequency tripling over a bandwidth of 5 nm (theoretical efficiency more than 80%).
陈英, 钱列加, 傅喜泉, 文双春, 周远, 刘安玲. 宽带钕玻璃激光的高效三次谐波转换[J]. 强激光与粒子束, 2011, 23(12): 3400. Chen Ying, Qian Liejia, Fu Xiquan, Wen Shuangchun, Zhou Yuan, Liu Anling. High efficiency third-harmonic generation of broadband Nd: glass laser[J]. High Power Laser and Particle Beams, 2011, 23(12): 3400.