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报道了基于空芯光纤的1.5μm光纤气体拉曼激光放大器。实验以一个1.5μm波段的可调谐分布式反馈激光器为种子源,输出的连续波种子激光与1064nm微芯片激光器的输出脉冲抽运激光通过双色镜一起耦合进充乙烷气体的空芯光纤中,通过乙烷分子的受激拉曼散射实现了高效率的1553nm拉曼激光输出。种子光的注入极大地降低了受激拉曼散射阈值,从而将拉曼光-光转换效率提高到47.5%。该研究为实现高效率的光纤气体拉曼激光输出提供了一条有效的技术途径。
A 1.5μm fiber-optic Raman laser amplifier based on hollow fiber is reported. The experiment uses a tunable distributed feedback laser of 1.5μm wavelength band as the seed source, the output continuous wave seed laser and the output pulsed laser of the 1064nm microchip laser are coupled into the hollow core fiber filled with ethane gas through the dichroic mirror, Stimulated Raman scattering of ethane molecules enables high efficiency 1553 nm Raman laser output. The injection of seed light greatly reduces the stimulated Raman scattering threshold, thereby increasing the Raman light-to-light conversion efficiency to 47.5%. This research provides an effective technical approach to achieve high efficiency fiber-optic Raman laser output.