Brillouin fiber lasers (BFLs) are a promising optical source technology for industrial and academic purposes that have experienced continuous progress in recent years. Currently, part of this development is focused on delivering laser solutions with low resonator loss, relatively low pump threshold, high efficiency, very small linewidth, and multi-wavelength architecture. In this perspective, this study employs an accurate numerical model based on an analytical solution to investigate the effect of the pump’s spectral linewidth on BFLs working both in single and cascaded multi-wavelength configurations. Output powers, thresholds, and the Stokes lines number simulated are analyzed here using a standard single-mode optical fiber as the Brillouin gain medium. The numerical results obtained not only allow identifying the regions of the pump’s spectral linewidth in which there is greater, moderate, or even no suppression of the stimulated Brillouin scattering inside the laser cavity but also provides a deep understanding of the internal dynamics of the BFLs cavities.

布里渊光纤激光器 (BFL) 是一种用于工业和学术目的的有前途的光源技术，近年来取得了不断进步。目前，该开发的一部分专注于提供具有低谐振腔损耗、相对较低的泵浦阈值、高效率、非常小的线宽和多波长架构的激光解决方案。从这个角度来看，本研究采用基于解析解的精确数值模型来研究泵的光谱线宽对在单波长和级联多波长配置中工作的 BFL 的影响。此处使用标准单模光纤作为布里渊增益介质来分析模拟的输出功率、阈值和斯托克斯线数。