All polarization maintaining erbium-doped fiber dual-ring laser with ultra-low threshold and ultra-narrow linewidth based on artificial random feedback structure

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

Optical Fiber Technology Pub Date : 2025-07-02 DOI:10.1016/j.yofte.2025.104311

Fujun Xu , Xiaxiao Wang , Xiaobin Xu , Ningfang Song

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引用次数: 0

Abstract

An ultra-low threshold and ultra-narrow linewidth erbium-doped fiber (EDF) hybrid laser based on all polarization maintaining dual-ring structure combined with artificial random scattering feedback is proposed and demonstrated. In this work, a 7-cm-long artificial random scattering fiber (ARF) inscribed by femtosecond laser is employed as a feedback structure for multi longitudinal mode suppression and a model is established to theoretically analyze the formation progress of achieving single longitudinal mode (SLM) laser output by the ARF feedback. A sub-ring, consisting of 2 m unpumped EDF-based saturable absorber is employed to produce an auto-tracking narrowband filter to ensure the SLM laser output. We achieve a SLM laser with an ultra-low threshold of 7 mW, an ultra-narrow linewidth of 315 Hz and an OSNR of 70 dB. In addition, the output power and center wavelength fluctuation of the proposed laser are 0.285 mW and 3.3 pm, respectively, over one hour.

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基于人工随机反馈结构的超低阈值超窄线宽全保偏掺铒光纤双环激光器

提出并演示了一种基于全保偏双环结构结合人工随机散射反馈的超低阈值超窄线宽掺铒光纤（EDF）混合激光器。本文采用飞秒激光内切的7 cm人工随机散射光纤（ARF）作为多纵模抑制的反馈结构，建立了ARF反馈实现单纵模激光输出的形成过程理论分析模型。采用由2 m无泵浦edf基饱和吸收体组成的子环产生自动跟踪窄带滤波器，以保证SLM激光输出。我们实现了超低阈值7 mW，超窄线宽315 Hz， OSNR为70 dB的SLM激光器。在1小时内，激光器的输出功率和中心波长波动分别为0.285 mW和3.3 pm。

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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.