Opt Lett. 2019 Apr 1;44(7):1801-1804. doi: 10.1364/OL.44.001801.
An over 200 W high-power first-order random Raman fiber laser (RRFL) at 1238 nm is demonstrated. The laser is based on a half-open cavity with a piece of 30 m phosphosilicate fiber. This RRFL is pumped by a conventional 1064 nm Yb-doped fiber laser. After suppressing the silica Raman component, a maximum output power of 206.7 W is obtained with a full width half-maximum linewidth of 7.1 nm at a pump power of 346.3 W, corresponding to an optical-to-optical efficiency of 59.7%. To the best of our knowledge, this is the highest reported output power of RRFL on the basis of phosphosilicate fiber with the shortest cavity length.
我们演示了一款输出功率超过 200W 的一级随机拉曼光纤激光器（RRFL），其中心波长为 1238nm。该激光器基于半开放式腔结构，采用 30m 长的磷硅光纤作为增益光纤。RRFL 采用常规的 1064nm 掺镱光纤激光器作为泵浦源。在抑制了光纤的瑞利散射后，在 346.3W 的泵浦功率下获得了 206.7W 的最大输出功率，其 7.1nm 的半峰全宽线宽对应于 59.7%的光光转换效率。据我们所知，这是基于最短腔长的磷硅光纤实现的 RRFL 中报道的最高输出功率。
