中国激光, 2020, 47 (4): 0415001, 网络出版: 2020-04-09
全光纤单频光纤放大器实现550 W近衍射极限输出 下载: 1146次
550-W Single-Frequency All-Fiber Amplifier with Near-Diffraction-Limited Beam Quality
激光器 高功率光纤激光 单频 受激布里渊散射 模式不稳定 lasers high power fiber laser single frequency stimulated Brillouin scattering mode instability
摘要
通过引入长锥形增益光纤综合抑制受激布里渊散射和模式不稳定效应,兼顾1030 nm波段信号光放大的高模式不稳定阈值特性,基于全光纤放大器实现了550 W的近衍射极限单频光纤激光输出,整个放大器的斜率效率达80%,最高功率时的光束质量测量值M2约为1.47;系统亮度的进一步提升受限于热致模式不稳定效应。
Abstract
In this study, a 550-W single-frequency all-fiber laser with near diffraction-limited beam quality is achieved by simultaneously suppressing the stimulated Brillouin scattering and mode instability effects with a long-tapered gain fiber and employing the ability of high mode instability threshold of 1030-nm signal laser. The slope efficiency of the whole amplifier is observed to be as high as 80% and the measured beam quality M2 is approximately 1.47 at the maximum output power. Further brightness scaling is limited owing to the mode instability effect.
来文昌, 马鹏飞, 刘伟, 黄龙, 李灿, 周朴. 全光纤单频光纤放大器实现550 W近衍射极限输出[J]. 中国激光, 2020, 47(4): 0415001. Lai Wenchang, Ma Pengfei, Liu Wei, Huang Long, Li Can, Zhou Pu. 550-W Single-Frequency All-Fiber Amplifier with Near-Diffraction-Limited Beam Quality[J]. Chinese Journal of Lasers, 2020, 47(4): 0415001.