Jing Gao, Dongdong Jiao, Jie Liu, Xue Deng, Qi Zang, Xiang Zhang, Dan Wang, Xiaofei Zhang, Tao Liu. Laser Linewidth Measurement Based on Recirculating Self-Heterodyne Method with Short Fiber[J]. Acta Optica Sinica, 2021, 41(7): 0712002
- Acta Optica Sinica
- Vol. 41, Issue 7, 0712002 (2021)
Fig. 1. Influence of delay time of delayed fiber on power spectral profile of beat signal
Fig. 2. Schematic of experimental setup of laser linewidth measurement based on recirculating self-heterodyne method with short fiber
Fig. 3. Influence of coupling coefficient on peak intensity of beat signal. (a) Output beat signal from interferometer when α=0.9; (b) output beat signal from interferometer when α=0.1
Fig. 4. Different beat signals and their fitted curves. (a) 2nd order beat signal; (b) 3rd order beat signal; (c) 4th order beat signal
Fig. 5. Laser linewidth measured by traditional beat frequency method
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