A random erbium-doped fiber laser based on fiber Bragg grating (FBG) and single-mode fiber (SMF) was designed and realized experimentally in this study. For the proposed random fiber laser (RFL), the 10 km long SMF was used to generate Rayleigh scattering (RS) emissions, along with FBG to provide randomly distributed feedback in the cavity. In the experiment, the RFL laser threshold is 55 mW, as the pump power is increasingly improved to 175 mW. The RS effect is gradually apparent, and 1531.59nm laser beam was formed. The signal-to-noise ratio was 38.4 dB. The FBG was stretched for sensing applications, and the lasing wavelength was adjusted from 1531.59 to 1533.83 nm when the grating was stretched from 0 to 2000 μϵ.

中文翻译：

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基于单模光纤和光纤布拉格光栅的半开腔随机光纤激光器

本研究设计并实验实现了一种基于光纤布拉格光栅（FBG）和单模光纤（SMF）的随机掺铒光纤激光器。对于所提出的随机光纤激光器 (RFL)，10 km 长的 SMF 用于生成瑞利散射 (RS) 发射，并与 FBG 一起在腔内提供随机分布的反馈。实验中，RFL激光阈值为55 mW，泵浦功率逐渐提高至175 mW。 RS效应逐渐显现，形成1531.59nm激光束。信噪比为38.4 dB。针对传感应用，FBG 被拉伸，当光栅从 0 拉伸到 2000 时，激光波长从 1531.59 调整到 1533.83 nmμε。