High-brightness 980 nm all-fiber oscillator with 27 % slope efficiency using chirped and tilted fiber Bragg grating

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

Optical Fiber Technology Pub Date : 2024-11-22 DOI:10.1016/j.yofte.2024.104054

Yonghui Luo , Haoyuan Liang , Wang Ju , Junjie Chen , Xianfeng Lin , Qiang Qiu , Zhilun Zhang , Xiaoliang Wang , Yingbin Xing , Nengli Dai , Jinyan Li

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Abstract

A method has been proposed to suppress the 1030 nm amplified spontaneous emission (ASE) of 980 nm ytterbium-doped fiber laser (YDFL) by embedding a chirped and tilted fiber Bragg grating (CTFBG) within the cavity. The influences of the positions, pieces, and cascaded methods of CTFBG on the performance of 980 nm YDFL were investigated. By embedding a single CTFBG in the cavity of 20/80 μm 980 nm YDFL, 6.4 W output power with a slope efficiency of 27 % was achieved. To the best of our knowledge, it was the highest slope efficiency of the 980 nm all-fiber oscillator with cost-effective 20 μm core diameter double-cladding YDF. The output power was increased by 17 % and the slope efficiency was increased by 6 % compared to the situation without CTFBG at the same peak-to-peak suppression ratio of 1030 nm ASE. The beam quality factor M² was measured at about 1.2, demonstrating a near-diffraction-limited laser. The study results have provided valuable insights for the design of a high-brightness 980 nm YDFL.

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使用啁啾和倾斜光纤布拉格光栅的高亮度 980 nm 全光纤振荡器，斜率效率达 27

通过在腔内嵌入啁啾和倾斜光纤布拉格光栅（CTFBG），提出了一种抑制 980 nm 掺镱光纤激光器（YDFL）1030 nm 放大自发辐射（ASE）的方法。研究了 CTFBG 的位置、片数和级联方法对 980 nm YDFL 性能的影响。通过在 20/80 μm 980 nm YDFL 的腔体中嵌入单个 CTFBG，实现了 6.4 W 的输出功率和 27% 的斜率效率。据我们所知，这是采用成本效益型 20 μm 芯径双包层 YDF 的 980 nm 全光纤振荡器中斜率效率最高的。与不使用 CTFBG 的情况相比，在 1030 nm ASE 的峰峰抑制比相同的情况下，输出功率提高了 17%，斜率效率提高了 6%。测量到的光束质量因子 M2 约为 1.2，表明这是一种接近衍射限制的激光器。研究结果为设计高亮度 980 nm YDFL 提供了宝贵的启示。

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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.