光学学报, 2017, 37(5): 0514002, 网络出版: 2017-05-01

1.5 μm光纤乙烷气体拉曼激光放大器

1.5 μm Fiber Ethane Gas Raman Laser Amplifier
作者单位

1国防科学技术大学光电科学与工程学院, 湖南 长沙 410073

2湖南省大功率光纤激光协同创新中心, 湖南 长沙 410073

3湖南省高能激光技术重点实验室, 湖南 长沙 410073

摘要
报道了基于空芯光纤的1.5 μm光纤气体拉曼激光放大器。实验以一个1.5 μm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1064 nm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1553 nm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。
Abstract
A 1.5 μm fiber gas Raman laser amplifier based on the hollow core fibers is reported. In the experiments, a 1.5 μm tunable distributed feed back laser is used as a seed. The output continuous wave seed laser, together with the output pulse pump laser of a 1064 nm microchip laser, is coupled into the ethane-filled hollow core fiber by using a dichroic mirror, and then efficiently generated 1553 nm Raman laser by stimulated Raman scattering of ethane gas. With the injected seed laser, the Raman scattering threshold is significantly decreased and the Raman conversion efficiency increases to 47.5%. This study provides an effective technical avenue to achieve the efficient fiber gas Raman laser output.
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