中文摘要：

实现了一种基于光纤中受激布里渊散射（SBS）效应的高分辨率光谱测量技术。使用连续可调谐分布反馈（DFB）激光器作为泵浦光，与待测信号光在单模光纤（SMF）中发生受激布里渊放大相互作用，由此实现对待测光的高分辨率光谱测量与分析。DFB激光器的波长扫描通过高精度温度调谐来实现。与相关报道中使用的外腔可调谐激光器对比，DFB激光器具有体积小、成本低的优势。同时在波长扫描过程中，对DFB激光器的输出光进行自拍频处理获得其实时扫描速率，以此校正激光器的实时扫描波长，提高测量准确度。实验初步验证了本文高分辨率光谱测量技术的可行性，并获得了0．24pm的光谱分辨率。

英文摘要：

In this paper, a high resolution optical spectrum measurement technology based on stimulated Brillouin scattering （SBS） in optical fibers is presented. A continuously tunable distributed feedback （DFB） laser is used as pump source. It interacts with signal light under test in single mode optical fibers via stimulated Brillouin amplification effect. The wavelength scanning of DFB laser is achieved by high precision temperature tuning. Compared with external-cavity tuning lasers used in previous similar studies, the DFB laser has many advantages, such as compact size, low cost, and better vibration resistance performance. In order to improve the measurement precision, the output light of DFB laser in tuning is self-beat and the beat frequency is processed to determine the real-time sweep velocity and wavelength. The feasibility of the high precision optical spectrum measurement technology is demonstrated in the measurements of two lasers,and the optical spectrum resolution of about 0. 24 pm is obtained.