光学
偏振控制器
光纤激光器
材料科学
梳状滤波器
波长
激光器
色散位移光纤
光纤布拉格光栅
保偏光纤
可调谐激光器
光纤
光纤传感器
光电子学
滤波器(信号处理)
物理
计算机科学
计算机视觉
作者
Honggang Pan,Zhanzhi Liu,Ailing Zhang,Taotao Guo,Yaomei Peng
出处
期刊:Applied Optics
[The Optical Society]
日期:2022-05-23
卷期号:61 (16): 4779-4779
被引量:7
摘要
A tunable and switchable multi-wavelength random distributed feedback fiber laser based on cascaded Sagnac loops is proposed and experimentally demonstrated. The random distribution feedback of the laser is provided by the Rayleigh scattering generated by the single-mode fiber (SMF). The cascaded Sagnac loops act as a filter and a reflector in the half-open cavity laser. The single-, dual-, three-, and four-wavelength channels can be realized by adjusting the angle of the polarization controller at the pump power of 300 mW. In the single-, dual-, and three-wavelength channels, the wavelength spacing can be maintained, and the laser wavelength position can be changed at the same time. The maximum wavelength tuning ranges of single-, dual-, and three-wavelength outputs are about 4.5 nm, 2.6 nm, and 1 nm, respectively. The proposed multi-wavelength random fiber laser has the advantages of simple structure and low threshold, and it has good application prospects in remote sensing and imaging systems.
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