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arXiv 2603.27554physics.optics
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稀土掺杂光纤中的部分抛物线放大

Partial parabolic amplification in rare-earth-doped optical fiber

School of Applied and Engineering Physics, Cornell University（康奈尔大学应用工程物理学院）

Wenchao Wang, Yi-Hao Chen, Frank Wise

备注：
Revise the main text and Sec.1 of the supplement due to Reviewers' response/advice
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AI总结：

本文通过系统优化种子脉冲宽度，识别出一种新的非线性放大机制——部分抛物线放大，实现了50飞秒脉冲和30兆瓦峰值功率，并有望通过大模场增益光纤实现更高能量缩放。

摘要：

非线性放大是在光纤系统中产生高峰值功率超短激光脉冲的强大技术。然而，非线性放大方法的多样性及其固有的复杂性给实现统一理解以及进一步缩放峰值功率和脉冲能量同时保持超短持续时间带来了重大挑战。在这里，我们报告了关于种子脉冲持续时间的系统优化结果，该优化阐明了非线性放大的动力学，并允许识别不同的传播状态。作为该分析的一部分，我们确定了一种新的状态，称为部分抛物线放大，它实现了50飞秒的脉冲持续时间，并产生了比迄今为止已知的任何其他非线性放大状态更高的峰值功率。部分抛物线放大的初步实验演示使用25微米芯径的Yb光纤放大器产生了50飞秒和2.2微焦耳的脉冲，对应30兆瓦的峰值功率。与其他非线性放大技术相比，使用具有更大模场面积的可用增益光纤，应该可以实现超过10微焦耳和200兆瓦的实际能量缩放，这将填补现有光纤激光器能力的空白，直接影响材料加工、非线性生物成像和其他应用。

英文摘要：

Nonlinear amplification is a powerful technique for generating ultrashort laser pulses with high peak power in fiber systems. However, the diversity of nonlinear amplification approaches and their inherent complexities present significant challenges to achieving a unified understanding and further scaling of peak power and pulse energy while preserving ultrashort durations. Here, we report the results of a systematic optimization with respect to seed pulse duration that elucidates the dynamics of nonlinear amplification and allows identification of distinct propagation regimes. As part of this analysis, we identify a new regime, termed partial parabolic amplification, which achieves 50-fs pulse duration and yields higher peak power than any other nonlinear amplification regime known to date. An initial experimental demonstration of partial parabolic amplification produces 50-fs and 2.2-uJ pulses with a 25-um-core Yb fiber amplifier, corresponding to a 30-MW peak power. In contrast to other nonlinear amplification techniques, practical energy scaling beyond 10 uJ and 200 MW should be achievable with available gain fibers with larger mode areas, which would fill a gap in existing fiber laser capabilities that would directly impact material processing, nonlinear bio-imaging, and other applications.

机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。

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