Bidirectional ytterbium-doped fiber laser with independent nonlinear-polarization-rotation mode-locking and gain medium

IF 4.6 2区物理与天体物理 Q1 OPTICS

Optics and Laser Technology Pub Date : 2025-07-22 DOI:10.1016/j.optlastec.2025.113574

Haiyang Xie , Pengrun Ying , Binxin Wang , Ruixin Tang , Ziyu Luo , Yijun He , Hui Liu

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Abstract

This paper presents a bidirectional mode-locked ytterbium-doped fiber laser with independent nonlinear polarization rotation (NPR) mode-locking and gain medium. This laser achieves robust bidirectional NPR mode-locking operation without the need for condition of saturation critical power and enables a direct and wide range control over the repetition frequency difference (0–38 kHz). The pulse energy reaches up to 2.8 nJ. The long-term fluctuation of the repetition rates is well-consistent, resulting in a stable repetition rate difference with standard deviation of 0.8 Hz while the repetition rate varies as large as 180 Hz. The intensity noise correlation and phase noise consistency are measured, revealing the complex noise behaviors in detail and the room for enhancing the mutual coherence. The interferograms are observed and Fourier transformed, resulting in a spectrum that is consistent with the optical spectra. This work offers an alternative solution for the bidirectional fiber mode-locked laser with pulse energy in the nanojoule range that benefits both linear and nonlinear dual-comb applications.

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具有独立非线性偏振旋转锁模和增益介质的双向掺镱光纤激光器

提出了一种具有独立非线性偏振旋转锁模和增益介质的双向掺镱光纤激光器。该激光器实现了强大的双向NPR锁模操作，无需饱和临界功率条件，并且能够直接和大范围地控制重复频率差（0-38 kHz）。脉冲能量可达2.8 nJ。重复率的长期波动具有很好的一致性，重复率差异稳定，标准差为0.8 Hz，而重复率变化最大可达180 Hz。测量了噪声强度相关性和相位噪声一致性，详细揭示了复杂的噪声行为和增强相互相干性的空间。对干涉图进行观察和傅里叶变换，得到与光谱一致的光谱。这项工作为脉冲能量在纳焦耳范围内的双向光纤锁模激光器提供了一种替代解决方案，有利于线性和非线性双梳应用。

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来源期刊

Optics and Laser Technology 物理-光学

CiteScore

8.50

自引率

10.00%

发文量

1060

审稿时长

3.4 months

期刊介绍： Optics & Laser Technology aims to provide a vehicle for the publication of a broad range of high quality research and review papers in those fields of scientific and engineering research appertaining to the development and application of the technology of optics and lasers. Papers describing original work in these areas are submitted to rigorous refereeing prior to acceptance for publication. The scope of Optics & Laser Technology encompasses, but is not restricted to, the following areas: •development in all types of lasers •developments in optoelectronic devices and photonics •developments in new photonics and optical concepts •developments in conventional optics, optical instruments and components •techniques of optical metrology, including interferometry and optical fibre sensors •LIDAR and other non-contact optical measurement techniques, including optical methods in heat and fluid flow •applications of lasers to materials processing, optical NDT display (including holography) and optical communication •research and development in the field of laser safety including studies of hazards resulting from the applications of lasers (laser safety, hazards of laser fume) •developments in optical computing and optical information processing •developments in new optical materials •developments in new optical characterization methods and techniques •developments in quantum optics •developments in light assisted micro and nanofabrication methods and techniques •developments in nanophotonics and biophotonics •developments in imaging processing and systems