Zlobina E A, Kablukov S I, Wolf A A, Dostovalov A V, Babin S A
Opt Lett. 2017 Jan 1;42(1):9-12. doi: 10.1364/OL.42.000009.
High beam quality and narrow spectrum have been obtained in a Raman fiber laser based on a 1.1 km long graded-index fiber directly pumped by a multimode 915 nm laser diode. The generation of a near-diffraction-limited beam at 954 nm with M≤1.27 and Δλ=0.42 nm at an output power above 10 W is enabled by a cavity mirror made of a special fiber Bragg grating inscribed by a femtosecond technique in the central part of the graded-index fiber core.
在基于1.1公里长渐变折射率光纤的拉曼光纤激光器中，通过多模915纳米激光二极管直接泵浦，获得了高光束质量和窄光谱。在渐变折射率光纤纤芯中心部分，采用飞秒技术写入的特殊光纤布拉格光栅制成的腔镜，能够在输出功率高于10瓦时，产生波长为954纳米、M≤1.27且Δλ = 0.42纳米的近衍射极限光束。
