单纵模布里渊掺铒光纤激光器的实验研究

Experimental Study of Single-Longitudinal-Mode Brillouin Erbium-Doped Fiber Laser

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 （SLM） Brillouin erbium-doped fiber laser （BEDFL） with multiple-ring cavities （MRC） and fiber Bragg grating tunable filter （FBG-TF） is proposed and demonstrated. The fine structure of optical spectrum is measured by observing the laser beat signals in the experiment, and effects of Brillouin gain, FBG-TF, and MRC on the single-mode output are discussed, respectively. The output characteristic curve and wavelength stability test chart are given. The single-mode output power of 4 dBm with the signal-noise-rate over 60 dB and linewidth of less than 1.5 kHz is achieved.