采用直接泵浦调制减轻光纤激光振荡器的横模不稳定性

IF 6.5 2区物理与天体物理 Q1 PHYSICS, MULTIDISCIPLINARY

Frontiers of Physics Pub Date : 2023-06-29 DOI:10.3389/fphy.2023.1212811

Junyu Chai, Wenguang Liu, Xiao-lin Wang, Qiong Zhou, Jiangbin Zhang, Peng Liu, Hanwei Zhang, Yao Lu, Dan Zhang, Zong-fu Jiang, Guo-min Zhao

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引用次数: 0

摘要

横模不稳定性（TMI）是一种热光学效应，会导致光束质量和平均功率的突然恶化。这种非线性效应将极大地限制光纤激光器的功率缩放。我们在直径为30μm的全光纤激光振荡器中演示了一种直接泵浦调制来减轻TMI。它只依赖于函数发生器和泵驱动器，而不需要反馈控制单元。泵浦LD和泵浦驱动器的组以及函数发生器通道之间的相位差对光束稳定性有很大影响。与连续波（CW）模式下的TMI阈值180W相比，通过基于多参数的直接泵浦调制，稳定波束的最大平均输出功率增加到310W。

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Mitigating transverse mode instability in fiber laser oscillator by employing direct pump modulation

The transverse mode instability (TMI) is a thermal-optical effect, inducing a sudden deterioration of beam quality and average power. This non-linear effect will greatly limit the power scaling of fiber lasers. We demonstrate a direct pump modulation to mitigate TMI in a 30 μm-core-diameter all-fiber laser oscillator. It only relies on function generator and pump drivers without the need of feedback control units. The groups of pump LDs and pump drivers and the phase difference between the channels of function generator have a great impact on the beam stability. Compared with the TMI threshold 180 W in continuous wave (CW) mode, the maximum average output power of a stabilized beam is increased up to 310 W via a multi-parameter-based direct pump modulation.

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来源期刊

Frontiers of Physics PHYSICS, MULTIDISCIPLINARY-

CiteScore

9.20

自引率

9.30%

发文量

898

审稿时长

6-12 weeks

期刊介绍： Frontiers of Physics is an international peer-reviewed journal dedicated to showcasing the latest advancements and significant progress in various research areas within the field of physics. The journal's scope is broad, covering a range of topics that include: Quantum computation and quantum information Atomic, molecular, and optical physics Condensed matter physics, material sciences, and interdisciplinary research Particle, nuclear physics, astrophysics, and cosmology The journal's mission is to highlight frontier achievements, hot topics, and cross-disciplinary points in physics, facilitating communication and idea exchange among physicists both in China and internationally. It serves as a platform for researchers to share their findings and insights, fostering collaboration and innovation across different areas of physics.