Infrared and Laser Engineering, Volume. 49, Issue 8, 20190542(2020)
Q-switched fiber laser with Ti: Bi2Te3 of different concentrations
Nonlinear optical switch based on two-dimensional material is the core device of Q-switched fiber laser. The concentration of two-dimensional material optical switch will directly affect its nonlinear optical absorption characteristics, thus change the time-domain characteristics of the pulse. Therefore, the influence of two-dimensional material concentration on Q-switched optical pulse was studied, and a saturable absorption optical switch based on Ti: Bi2Te3 with different concentrations was made through experiments. The influence of Ti: Bi2Te3 concentration on nonlinear optical absorption characteristics was analyzed, and the relationship among the modulation depth, pulse width, repetition frequency and single pulse energy of Q-switched optical pulse with different concentrations Bi2Te3 was obtained. Finally, the Ti:Bi2Te3 concentration was optimized for the resonator parameters. When the pump power is 71 mW, the central wavelength is 1 560 nm, the pulse width is 8 μs, the repetition frequency is 14.2 kHz, the average output power is 2.15 mW, and the corresponding single pulse energy is 151.4 nJ.
Get Citation
Copy Citation Text
Wei Pan, Hualong Chen, Tiebin Wan, Hongwei Zhang, Liang Jin, He Zhang, Yingtian Xu, Yonggang Zou, Linlin Shi, Xiaohui Ma. Q-switched fiber laser with Ti: Bi2Te3 of different concentrations[J]. Infrared and Laser Engineering, 2020, 49(8): 20190542
Category: 激光器与激光光学
Received: Nov. 3, 2019
Accepted: Dec. 28, 2019
Published Online: Dec. 31, 2020
The Author Email: Ma Xiaohui (mxh@cust.edu.cn)