Wavelength switchable erbium doped fiber laser based on hybrid filter composed of Sagnac loop and Mach-Zehnder filter using tunable delay line

IF 2.7 3区计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Optical Fiber Technology Pub Date : 2025-09-20 DOI:10.1016/j.yofte.2025.104419

Lihang Xu , Wei He , Qiongyue Zhang , Shaode Li

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Abstract

In this study, a switchable and tunable erbium-doped fiber laser (EDFL) based on a tunable Mach-Zehnder (MZ) and Sagnac hybrid filter was proposed. An optical delay line (ODL) was inserted into one arm of the MZ interferometer (MZI) to control the comb spacing, forming a hybrid filtering system with the Sagnac loop. The erbium-doped fiber (EDF) serves as the gain medium for the fiber laser, with a lasing threshold of 43 mW. When the EDFL was set to single-wavelength output, a tuning range from 1556.1 to 1567.4 nm was achieved by adjusting the polarization controller (PC). In the dual-wavelength output, the wavelength spacing could be tuned within the range of 0.84 to 6.62 nm, with side-mode suppression ratio (SMSR) exceeding 33.44 dB. Wavelength drift and power fluctuations were controlled to be less than 0.112 nm and 2.73 dB, respectively. Stable three-wavelength and four-wavelength laser outputs were also achieved, each with SMSR values exceeding 31.04 dB. The proposed hybrid filter EDFL exhibited flexible tuning capabilities and simple structure, indicating potential applications in fiber sensing and optical communication.

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基于Sagnac环和Mach-Zehnder滤波器混合滤波器的波长可调掺铒光纤激光器

本文提出了一种基于可调谐Mach-Zehnder （MZ）和Sagnac混合滤波器的可调谐调谐掺铒光纤激光器。在MZ干涉仪（MZI）的一个臂上插入光延迟线（ODL）来控制梳间距，与Sagnac环路形成混合滤波系统。掺铒光纤（EDF）作为光纤激光器的增益介质，激光阈值为43 mW。当EDFL设置为单波长输出时，通过调节偏振控制器（PC）实现了1556.1 ~ 1567.4 nm的调谐范围。在双波长输出中，波长间距可在0.84 ~ 6.62 nm范围内调谐，侧模抑制比（SMSR）超过33.44 dB。波长漂移和功率波动分别控制在0.112 nm和2.73 dB以内。稳定的三波长和四波长激光输出，SMSR值均超过31.04 dB。所提出的混合滤波器EDFL具有灵活的调谐能力和简单的结构，在光纤传感和光通信领域具有潜在的应用前景。

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

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.