Fiber Optics Group, Department of Physics, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada.
Opt Lett. 2013 Jun 1;38(11):1866-8. doi: 10.1364/OL.38.001866.
We observed narrow-linewidth lasing spikes in a coherent Brillouin random fiber laser, which uses a continuous-wave fiber laser as the pump source. In this random laser configuration, stimulated Brillouin scattering in a section of conventional single-mode fiber acts as the gain mechanism, while Rayleigh scattering in another section of the nonuniform fiber provides randomly distributed feedback. Above the lasing threshold, coherent random lasing spikes, with a linewidth of ~10 Hz, are measured at the top of the Brillouin gain spectrum. It results from high quality coherent resonance of the Brillouin Stokes light in this open laser cavity.
我们在一个相干布里渊随机光纤激光器中观察到了窄线宽激光尖峰，该激光器使用连续波光纤激光器作为泵浦源。在这种随机激光结构中，常规单模光纤中的受激布里渊散射作为增益机制，而不均匀光纤的另一段中的瑞利散射提供了随机分布的反馈。在激光阈值以上，在布里渊增益光谱的顶部测量到具有约 10 Hz 线宽的相干随机激光尖峰。这是由于在这个开放的激光腔中布里渊斯托克斯光的高质量相干共振。
