Wei Kaihua, Zhang Libin, Zhu Hairong, Hou Jia, Xu Zhousu, Yu Zhonghua
State Key Laboratory of Fluid Power and Mechatronic Systems, School of Mechanical Engineering, Zhejiang University, Hangzhou 310058, China.
Hangzhou Electric Connector Factory, Hangzhou 310052, China.
Materials (Basel). 2022 Oct 26;15(21):7495. doi: 10.3390/ma15217495.
Herein, a PbSe quantum dot-doped-mode-locked fiber laser is experimentally demonstrated. A PbSe quantum dot-doped fiber is prepared using a melting method and induced as a gain medium in our mode-locked fiber laser. By increasing the pump power, a stable pulse train is obtained with a pulse duration of 36 ps, a pulse repetition rate of 4.5 MHz, an average laser power of 9.8 mW, and a central wavelength of 1214.5 nm. The pulse duration can be changed by adjusting the PC or increasing the pump power. The maximum laser power obtained was 42.7 mW under the pump power of 800 mW. Our results prove that a quantum dot-doped-mode-locked fiber laser is achievable, which provides a new scheme to solve wavelength problem of rare-earth-doped mode-locked fiber lasers.
在此，通过实验证明了一种掺PbSe量子点锁模光纤激光器。采用熔融法制备了掺PbSe量子点光纤，并将其用作我们锁模光纤激光器的增益介质。通过增加泵浦功率，获得了稳定的脉冲序列，脉冲持续时间为36 ps，脉冲重复频率为4.5 MHz，平均激光功率为9.8 mW，中心波长为1214.5 nm。通过调整偏振控制器（PC）或增加泵浦功率可以改变脉冲持续时间。在800 mW的泵浦功率下获得的最大激光功率为42.7 mW。我们的结果证明了掺量子点锁模光纤激光器是可行的，这为解决掺稀土锁模光纤激光器的波长问题提供了一种新方案。
