基于锥形掺镱光纤的全光纤单频放大器横模不稳定性实验研究

IF 4.7 Q2 MATERIALS SCIENCE, BIOMATERIALS ACS Applied Bio Materials Pub Date : 2024-07-26 DOI:10.3390/photonics11080696

Yue Tao, Zhengfei Mo, Pengrui Kang, Man Jiang, Can Li, Jin-yong Leng, Pu Zhou, Zongfu Jiang

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引用次数: 0

摘要

我们通过实验研究了使用锥形掺镱光纤（TYDF）构建的线性偏振单频光纤激光放大器在不同弯曲直径下的横模不稳定性（TMI）阈值。当弯曲直径从 16 厘米减小到 12 厘米时，TMI 门限从 333 W 上升到 451 W，同时光束质量从 1.47 下降到 1.67。TMI 门限、弯曲直径和光束质量之间的反常特性主要归因于高阶模式 (HOM) 内容的弯曲损耗减少，这是因为紧密弯曲引起的放大效率损失导致系统热负荷增加。相信这些结果将为大功率单频光纤放大器的设计提供有用的指导。

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Experimental Study on Transverse Mode Instability of All-Fiber Single-Frequency Amplifier Based on Tapered Yb-Doped Fiber

We experimentally studied the transverse mode instability (TMI) threshold of a linearly polarized single-frequency fiber laser amplifier constructed with tapered ytterbium-doped fiber (TYDF) under different bending diameters. The TMI threshold increased from 333 W to 451 W by reducing the bending diameter from 16 cm to 12 cm, which was accompanied by the deterioration of the beam quality from 1.47 to 1.67. The anomalous characteristics between the TMI threshold, bending diameter, and beam quality are mainly attributed to the decreased bending loss of higher-order mode (HOM) content as a result of the increased system heat loads caused by a tight bending-induced loss of amplification efficiency. It is believed that the presented results will provide useful guidelines for the design of high-power single-frequency fiber amplifiers.

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来源期刊

ACS Applied Bio Materials Chemistry-Chemistry (all)

CiteScore

9.40

自引率

2.10%

发文量

464

期刊介绍： ACS Applied Bio Materials is an interdisciplinary journal publishing original research covering all aspects of biomaterials and biointerfaces including and beyond the traditional biosensing, biomedical and therapeutic applications. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrates knowledge in the areas of materials, engineering, physics, bioscience, and chemistry into important bio applications. The journal is specifically interested in work that addresses the relationship between structure and function and assesses the stability and degradation of materials under relevant environmental and biological conditions.