Dontsova E I, Kablukov S I, Vatnik I D, Babin S A
Opt Lett. 2016 Apr 1;41(7):1439-42. doi: 10.1364/OL.41.001439.
This Letter presents what we believe is the first experimental study of frequency doubling of a Raman fiber laser (RFL) with random distributed feedback (RDFB) in an MgO:PPLN crystal. We compared two laser configurations, each with a half-open cavity. The cavity contained either a broadband Sagnac mirror or a narrowband fiber Bragg grating (FBG). We found that spectral broadening in the studied configurations of the RDFB RFLs differed from that found in a conventional RFL with a linear cavity, as well as from each other. We also compared the second harmonic generation (SHG) efficiency for these three types of lasers. The highest SHG efficiency was obtained for the RDFB RFL with the FBG delivering >100 mW power at 654 nm.
本信函展示了我们认为的首次关于在MgO:PPLN晶体中对具有随机分布反馈（RDFB）的拉曼光纤激光器（RFL）进行倍频的实验研究。我们比较了两种激光配置，每种配置都有一个半开放腔。该腔中要么包含一个宽带萨格纳克镜，要么包含一个窄带光纤布拉格光栅（FBG）。我们发现，所研究的RDFB RFL配置中的光谱展宽与传统线性腔RFL中的不同，并且这两种配置之间也存在差异。我们还比较了这三种类型激光器的二次谐波产生（SHG）效率。对于带有FBG的RDFB RFL，在654 nm处输出功率>100 mW时获得了最高的SHG效率。
