Institute of Photonics and Optical Sciences (IPOS), School of Physics, University of Sydney, Sydney, NSW 2006, Australia.
Opt Lett. 2013 Sep 1;38(17):3208-11. doi: 10.1364/OL.38.003208.
We present, to the best of our knowledge, the first demonstration of a narrow linewidth, waveguide-based Brillouin laser that is enabled by large Brillouin gain of a chalcogenide chip. The waveguides are equipped with vertical tapers for low-loss coupling. Due to optical feedback for the Stokes wave, the lasing threshold is reduced to 360 mW, which is five times lower than the calculated single-pass Brillouin threshold for the same waveguide. The slope efficiency of the laser is found to be 30%, and the linewidth of 100 kHz is measured using a self-heterodyne method.
据我们所知，我们首次展示了一种基于波导的窄线宽布里渊激光器，其通过硫属化物芯片的大布里渊增益得以实现。这些波导配备了垂直锥形结构，用于实现低损耗耦合。由于斯托克斯波的光反馈，激光阈值降低到 360mW，比相同波导的计算单通布里渊阈值低五倍。通过自外差法测量到激光的斜率效率为 30%，线宽为 100kHz。
