Stable narrow linewidth single-longitudinal-mode Tm3+-doped fiber laser with compound cavity filter and self-injection feedback

IF 2.6 3区计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Optical Fiber Technology Pub Date : 2024-12-16 DOI:10.1016/j.yofte.2024.104095

Qiuyu Huang , Fengping Yan , Ting Feng , Dandan Yang , Haoyu Tan , Ting Li , Yuezhi Cai , Siyu Peng , Youchao Jiang

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引用次数: 0

Abstract

A single-longitudinal-mode (SLM) Tm³⁺-doped fiber laser based on self-injection feedback with narrow linewidth and high stability is proposed and demonstrated. The effective free spectral range is effectively expanded using a traditional ring main cavity structure combined with a triple-coupler double-ring compound-cavity (TCDR-CC) filter. The TCDR-CC filter cooperates with a uniform fiber Bragg grating (UFBG) to improve mode-selection and enable SLM operation. Delay fibers with different lengths are introduced outside of the main cavity to form self-injection feedback, and the linewidth compression effect of the self-injection feedback is explored by varying the power of the feedback and the length of the delay fiber. A SLM fiber laser operating at 2048.42 nm is obtained with an optical-signal-to-noise ratio (OSNR) of 77.30 dB. In addition, this laser has high stability because the output power and wavelength fluctuate only slightly — by less than 0.2 mW and 0.02 nm, respectively. It has been confirmed that after the addition of different lengths of delay fiber, the linewidth can be effectively compressed. In particular, the linewidth for a 100-m delay fiber and an integration time of 0.001 s is the least, 1.3 kHz.

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来源期刊

Optical Fiber Technology 工程技术-电信学

CiteScore

4.80

自引率

11.10%

发文量

327

审稿时长

63 days

期刊介绍： Innovations in optical fiber technology are revolutionizing world communications. Newly developed fiber amplifiers allow for direct transmission of high-speed signals over transcontinental distances without the need for electronic regeneration. Optical fibers find new applications in data processing. The impact of fiber materials, devices, and systems on communications in the coming decades will create an abundance of primary literature and the need for up-to-date reviews. Optical Fiber Technology: Materials, Devices, and Systems is a new cutting-edge journal designed to fill a need in this rapidly evolving field for speedy publication of regular length papers. Both theoretical and experimental papers on fiber materials, devices, and system performance evaluation and measurements are eligible, with emphasis on practical applications.