Spectrum, beam quality and temporal stability of a diode pumped GRIN fiber Raman laser

IF 2.6 3区计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Optical Fiber Technology Pub Date : 2025-07-14 DOI:10.1016/j.yofte.2025.104345

Haotuo Shen , Huawei Jiang , Jiaqi Zhou , Xuezong Yang , Yan Feng

引用次数: 0

Abstract

The output performance of an all-fiber diode pumped graded-index fiber Raman laser at 974 nm is investigated experimentally in detail. The laser is formed with kilometer length of 62.5/125 μm multimode fiber and a pair of fiber Bragg gratings inscribed in the same fiber. A maximum output power of 23.5 W is demonstrated, with a slope efficiency of 48.1 %. Beam cleaning from multimode diode pump at 940 nm (M² ∼ 23) to Raman laser output at 974 nm (M² ∼ 2) is observed. The output spectra exhibit multiple peaks, which are corresponded to different transverse mode groups. A direct link between spectrum and beam quality can then be established. The laser is temporally stable in first order Raman operation but becomes noisy and then fluctuates periodically after the emergence of the second order Raman Stokes.

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二极管泵浦GRIN光纤拉曼激光器的光谱、光束质量和时间稳定性

实验研究了974 nm全光纤二极管泵浦渐变折射率光纤拉曼激光器的输出性能。该激光器由千米长的62.5/125 μm多模光纤组成，光纤中嵌有一对光纤布拉格光栅。最大输出功率为23.5 W，斜率效率为48.1%。观察到940 nm （M2 ~ 23）多模二极管泵浦的光束清洗到974 nm （M2 ~ 2）的拉曼激光器输出。输出光谱呈现出多个峰，对应于不同的横模群。这样就可以建立光谱和光束质量之间的直接联系。激光在一阶拉曼工作时是暂时稳定的，但在二阶拉曼斯托克斯出现后产生噪声并周期性波动。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Optical Fiber Technology 工程技术-电信学

CiteScore

4.80

自引率

11.10%

发文量

327

审稿时长

63 days

期刊介绍： Innovations in optical fiber technology are revolutionizing world communications. Newly developed fiber amplifiers allow for direct transmission of high-speed signals over transcontinental distances without the need for electronic regeneration. Optical fibers find new applications in data processing. The impact of fiber materials, devices, and systems on communications in the coming decades will create an abundance of primary literature and the need for up-to-date reviews. Optical Fiber Technology: Materials, Devices, and Systems is a new cutting-edge journal designed to fill a need in this rapidly evolving field for speedy publication of regular length papers. Both theoretical and experimental papers on fiber materials, devices, and system performance evaluation and measurements are eligible, with emphasis on practical applications.