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报道了一种由宽带光纤环形镜(FLM)作为腔反射元件的法布里-珀罗腔掺磷光纤拉曼激光器(RFL),并与使用窄带光纤布拉格光栅(FBG)作为高反镜的腔结构进行了对比研究。研究结果表明,使用宽带FLM替代FBG仍可实现掺磷RFL的窄带激光输出,并且可有效避免拉曼激光从高反镜端的泄漏。在相同的输出镜反射率情况下,使用FLM作为高反镜比使用FBG作为高反镜具有更低的振荡阈值和更高的光-光转换效率。当抽运功率为9.45W时,拉曼激光(1.24μm)输出功率为4.31W,激光器斜效率和光-光转换效率分别为57.9%和45.6%。
A Fabry-Perot cavity-doped fiber Raman laser (RFL) with a wideband fiber optic ring mirror (FLM) as a cavity reflecting element is reported, and is compared with a cavity using a narrowband fiber Bragg grating (FBG) Structure of a comparative study. The results show that the use of broadband FLM instead of FBG can still achieve narrow-band laser output of phosphorus-doped RFL, and can effectively avoid the Raman laser lens leak from the high side mirror. With the same output mirror reflectivity, the use of FLM as a high reflectivity has a lower oscillation threshold and a higher optical-to-optical conversion efficiency than using an FBG as a high reflectivity mirror. When the pumping power is 9.45W, Raman laser (1.24μm) output power is 4.31W, and laser slope efficiency and light-light conversion efficiency are 57.9% and 45.6% respectively.