Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7129113 | Optics & Laser Technology | 2018 | 6 Pages |
Abstract
This paper proposes and demonstrates a single-longitudinal-mode, narrow bandwidth fiber laser, using an ultra-high roundness microsphere resonator (MSR) with a stabilized package as the single-longitudinal-mode selector inside a double-ring fiber cavity. By improving the heating technology and surface cleaning process, MSR with high Q factor are obtained. With the optimized coupling condition, light polarization state and fiber taper diameter, we achieve whispering gallery mode (WGM) spectra with a high extinction ratio of 23â¯dB, coupling efficiency of 99.5%, a 3â¯dB bandwidth of 1â¯pm and a side-mode-suppression-ratio of 14.5â¯dB. The proposed fiber laser produces single-longitudinal-mode laser output with a 20-dB frequency linewidth of about 340â¯kHz, a signal-to-background ratio of 54â¯dB and a high long-term stability without mode-hopping, which is potential for optical communication and sensing applications.
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Authors
Hongdan Wan, Linqian Liu, Zuoqin Ding, Jie Wang, Yu Xiao, Zuxing Zhang,