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提出了一种具有多环形腔(MRC)和光纤布拉格光栅可调谐滤波器(FBG-TF)相结合的单纵模布里渊掺铒光纤激光器(BEDFL)。实验中通过观察激光器输出光的拍频信号分析其光谱精细结构,分别讨论了布里渊增益、FBG-TF、MRC对BEDFL单模输出的贡献,给出了激光器的功率特性曲线和波长稳定性测试图。实验得到了在1550 nm处功率为4 dBm,信噪比(SNR)>60 dB,线宽小于1.5 kHz的稳定单纵模输出光。
A single-longitudinal-mode Brillouin erbium-doped fiber laser (BEDFL) with a combination of multi-annular cavity (MRC) and fiber Bragg grating tunable filter (FBG-TF) is proposed. In this experiment, we observe the fine structure of the laser by measuring the beat frequency of the laser output light. The contributions of Brillouin gain, FBG-TF and MRC to single-mode output of BEDFL are discussed respectively. The power characteristic curve and wavelength stability Test chart The experiment results show that the power of 4 dBm at 1550 nm, the signal-to-noise ratio (SNR)> 60 dB, and the stable single longitudinal mode output light with line width less than 1.5 kHz are obtained.