| FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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Ultrafast Fiber Laser Based on Tungsten Sulphoselenide Materials |
| Xiao-Chuan Meng1, Lu Li2*, Nai-Zhang Sun1, Ze Xue2, Qi Liu1, Han Ye1*, and Wen-Jun Liu1,3* |
1State Key Laboratory of Information Photonics and Optical Communications, School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, China
2School of Science, Xi'an University of Posts and Telecommunications, Xi'an 710121, China
3Hebei Key Laboratory of Physics and Energy Technology, North China Electric Power University, Baoding 071000, China
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| Cite this article: |
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Xiao-Chuan Meng, Lu Li, Nai-Zhang Sun et al 2023 Chin. Phys. Lett. 40 124202 |
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Abstract Tungsten sulphoselenide (WSSe) alloys, belonging to the transition metal dichalcogenide family, have attracted significant interest in the area of optoelectronics because of their unique optical and electronic properties. However, there has been a dearth of sufficient research on the saturable absorption features and ultrafast lasers applications. Herein, we fabricated a WSSe-microfiber saturable absorber (SA) based on WSSe nanosheets prepared by liquid exfoliation technique. The SA provided a saturation intensity of a modulation depth of 27.95% and a nonsaturable loss of 21.34%. To investigate the potential applications of WSSe in ultrafast photonics, the prepared WSSe-microfiber was incorporated into an Er-doped fiber laser ring cavity. The results demonstrated that the WSSe-based SA successfully generated mode-locking laser pulses with a remarkably short pulse width of 231 fs. Furthermore, the output power of this ultrafast fiber laser reached an impressive value of 15.68 mW. These findings provide valuable views into the unique features of WSSe alloys in the areas of ultrafast optics and develop recipes for SA in ultrafast fiber lasers.
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Received: 15 November 2023
Published: 21 December 2023
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