Coherent instabilities in thulium-based fiber amplifiers induced by laser frequency modulation.

IF 3.1 2区物理与天体物理 Q2 OPTICS

Optics letters Pub Date : 2024-11-15 DOI:10.1364/OL.539160

Andrea Pertoldi, Jakob M Hauge, Patrick Bowen Montague, Poul Varming

引用次数: 0

Abstract

Frequency modulation of narrow-linewidth lasers can cause coherent backscattering in cladding-pumped fiber amplifiers. This detrimental effect can be observed in Tm-based fiber amplifiers and can be an additional limitation for power scaling applications. We investigate such instabilities in Tm- and Tm/Ho-doped fiber amplifiers for a wide range of design parameters (active fiber length, pumping scheme, dopant type) and operation regimes (laser frequency tuning rate, amplifier gain). For each amplifier configuration, the backward-propagating (BP) signal is found to peak at a specific laser frequency tuning rate, with an amplitude and a frequency that increase with increasing amplifier gain and fiber length.

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激光频率调制诱发铥基光纤放大器的相干不稳定性。

窄线宽激光器的频率调制会在包层泵浦光纤放大器中产生相干反向散射。在掺锝光纤放大器中可以观察到这种有害效应，并可能成为功率扩展应用的额外限制。我们针对各种设计参数（有源光纤长度、泵浦方案、掺杂类型）和工作状态（激光频率调谐率、放大器增益），研究了掺噻姆和掺噻姆/掺豪光纤放大器中的这种不稳定性。对于每种放大器配置，发现后向传播 (BP) 信号在特定激光频率调谐率下达到峰值，其振幅和频率随放大器增益和光纤长度的增加而增加。

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

Optics letters 物理-光学

CiteScore

6.60

自引率

8.30%

发文量

2275

审稿时长

1.7 months

期刊介绍： The Optical Society (OSA) publishes high-quality, peer-reviewed articles in its portfolio of journals, which serve the full breadth of the optics and photonics community. Optics Letters offers rapid dissemination of new results in all areas of optics with short, original, peer-reviewed communications. Optics Letters covers the latest research in optical science, including optical measurements, optical components and devices, atmospheric optics, biomedical optics, Fourier optics, integrated optics, optical processing, optoelectronics, lasers, nonlinear optics, optical storage and holography, optical coherence, polarization, quantum electronics, ultrafast optical phenomena, photonic crystals, and fiber optics. Criteria used in determining acceptability of contributions include newsworthiness to a substantial part of the optics community and the effect of rapid publication on the research of others. This journal, published twice each month, is where readers look for the latest discoveries in optics.