Balaswamy V, Arun S, Aparanji Santosh, Choudhury Vishal, Supradeepa V R
Opt Lett. 2018 Apr 1;43(7):1574-1577. doi: 10.1364/OL.43.001574.
Cascaded Raman lasers enable high powers at various wavelength bands inaccessible with conventional rare-earth-doped lasers. The input and output wavelengths of conventional implementations are fixed by the constituent fiber gratings necessary for cascaded Raman conversion. We demonstrate here a simple architecture for high-power, fixed, and wavelength tunable, grating-free, cascaded Raman conversion between different wavelength bands. The architecture is based on the recently proposed distributed feedback Raman lasers. Here, we implement a module which converts the ytterbium band to the eye-safe 1.5 μm region. We demonstrate pump-limited output powers of over 30 W in fixed and continuously wavelength tunable configurations.
级联拉曼激光器能够在传统稀土掺杂激光器无法达到的多个波长波段实现高功率输出。传统级联拉曼激光器的输入和输出波长由级联拉曼转换所需的组成光纤光栅固定。在此，我们展示了一种用于不同波段之间高功率、固定且波长可调、无光栅的级联拉曼转换的简单架构。该架构基于最近提出的分布式反馈拉曼激光器。在此，我们实现了一个将镱波段转换至人眼安全的1.5μm区域的模块。我们展示了在固定和连续波长可调配置下超过30W的泵浦限制输出功率。
