Tunable double-clad ytterbium-doped fiber laser based on a double-pass Mach-Zehnder interferometer |
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Authors: | Yichang MengShumin Zhang Xinzhan WangJuan Du Hongfei LiYanping Hao Xingliang Li |
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Institution: | College of Physics Science and Information Engineering, Hebei Advanced Thin Films Laboratory, Hebei Normal University, Shijiazhuang 050016, China |
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Abstract: | We have demonstrated an adjustable double-clad Yb3+-doped fiber laser using a double-pass Mach-Zehnder interferometer. The laser is adjustable over a range of 40 nm from 1064 nm to 1104 nm. By adjusting the state of the polarization controller, which is placed in the double-pass Mach-Zehnder interferometer, we obtained central lasing wavelengths that can be accurately tuned with controllable spacing between different tunable wavelengths. The laser has a side mode suppression ratio of 42 dB, the 3 dB spectral width is less than 0.2 nm, and the slope efficiencies at 1068 nm, 1082 nm and 1098 nm are 23%, 32% and 26%, respectively. In addition, we have experimentally observed tunable multi-wavelengths lasing output. |
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Keywords: | Wavelength-tunable Double-pass Mach-Zehnder interferometer Double-clad ytterbium-doped fiber |
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