TiS2-based saturable absorber for ultrafast fiber lasers
We fabricate titanium disulfide (TiS2) using a liquid exfoliation method and subsequently a TiS2-based device by optically depositing the TiS2 material onto the microfiber. This device exhibits a strong nonlinear saturable absorption property with an optical modulation depth of 8.3% at 1560 nm. With the implementation of this all-fiber TiS2-based saturable absorber, we demonstrate that both mode-locking and Q-switching operation can be obtained in a turn-key all-fiber erbium-doped laser cavity. Our findings constitute the first example, to the best of our knowledge, of a TiS2-based saturable absorber for ultrashort pulse generation and highlight the great potential of such devices in two-dimensional nanomaterials-related photonics.
基金项目：Fundamental Research Funds for the Central Universities; National Natural Science Foundation of China (NSFC)10.13039/501100001809 (51778030, 61505005, 61505112).
S. Chen：Department of Optoelectronics Engineering, Shenzhen University, Shenzhen 518060, China
M. Zhang：School of Electronic and Information Engineering, Beihang University, Beijing 100191, China
L. Chen：Department of Optoelectronics Engineering, Shenzhen University, Shenzhen 518060, ChinaCollege of Health Science and Environmental Engineering, Shenzhen Technology University, Shenzhen 518118, Chinae-mail: firstname.lastname@example.org
Q. Wu：School of Electronic and Information Engineering, Beihang University, Beijing 100191, China
J. Zhao：College of Materials Science and Engineering, Shenzhen University, Shenzhen 518060, China
Q. Jiang：School of Electronic and Information Engineering, Beihang University, Beijing 100191, China
Z. Zheng：School of Electronic and Information Engineering, Beihang University, Beijing 100191, China
H. Zhang：Department of Optoelectronics Engineering, Shenzhen University, Shenzhen 518060, China
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X. Zhu, S. Chen, M. Zhang, L. Chen, Q. Wu, J. Zhao, Q. Jiang, Z. Zheng, and H. Zhang, "TiS2-based saturable absorber for ultrafast fiber lasers," Photonics Research 6(10), C44 (2018)