Wang Meng, Zhang Yujing, Wang Zefeng, Sun Junjie, Cao Jianqiu, Leng Jinyong, Gu Xijia, Xu Xiaojun
Opt Express. 2017 Jan 23;25(2):1529-1534. doi: 10.1364/OE.25.001529.
Stimulated Raman scattering (SRS) is one of the main limits for fiber lasers further power scaling. We report on the suppression of the stimulated Raman scattering in fiber laser amplifier using chirped and tilted fiber Bragg gratings (CTFBGs) for the first time. In this paper, we design and fabricate a CTFBG used to suppress the SRS in 1090 nm fiber laser output, and establish a system to test the effect of suppression. A maximum suppression ratio nearly 25 dB is achieved. Experimental results demonstrate that CTFBGs can increase the Raman threshold and promote the slope efficiency of the whole system, which is significant for further power scaling in high power oscillators and amplifiers.
受激拉曼散射（SRS）是光纤激光器进一步提高功率的主要限制因素之一。我们首次报道了利用啁啾倾斜光纤布拉格光栅（CTFBG）抑制光纤激光放大器中的受激拉曼散射。在本文中，我们设计并制作了一种用于抑制1090 nm光纤激光输出中SRS的CTFBG，并建立了一个系统来测试抑制效果。实现了近25 dB的最大抑制比。实验结果表明，CTFBG可以提高拉曼阈值并提升整个系统的斜率效率，这对于高功率振荡器和放大器的进一步功率扩展具有重要意义。
