Acousto-Optic Q-Switched Ho:YLF Ring Laser Based on Anti-Misalignment Resonant Cavity
Yunpeng Wang,
Dongming Zhang,
Dong Yan,
Tongyu Dai,
Youlun Ju
Affiliations
Yunpeng Wang
Institute of Laser Engineering, Faculty of Materials and Manufacturing, Beijing University of Technology, 100 Pingleyuan, Chaoyang District, Beijing 100124, China
Dongming Zhang
Institute of Laser Engineering, Faculty of Materials and Manufacturing, Beijing University of Technology, 100 Pingleyuan, Chaoyang District, Beijing 100124, China
Dong Yan
National Key Laboratory of Tunable Laser Technology, Harbin Institute of Technology, 92 Xidazhi Street, Nangang District, Harbin 150001, China
Tongyu Dai
National Key Laboratory of Tunable Laser Technology, Harbin Institute of Technology, 92 Xidazhi Street, Nangang District, Harbin 150001, China
Youlun Ju
National Key Laboratory of Tunable Laser Technology, Harbin Institute of Technology, 92 Xidazhi Street, Nangang District, Harbin 150001, China
An acousto-optic Q-switching Ho:YLF ring oscillator at 2066.33 nm with two anti-misalignment corner cube reflectors (CCRs) pumped by a 1940 nm thulium-doped fiber laser is demonstrated. The depolarization effect of the CCR is expressed in the form of equivalent transmission, and the transmission from two output directions of the oscillator is changing synchronously and periodically as the waveplate angle changes. In the experiment, under the pump power of 21.76 W, the optimum bidirectional energy of 3.13 mJ for a pulse duration of 122 ns at a repetition rate of 50 Hz is realized. The pulse energy reduction percentage at 50 Hz is 8% by changing the horizontal drift angle of one of the CCRs to 4.5°. The beam quality factor M2 is calculated to be about 1.10, revealing that the Ho laser is working in a fundamental transverse mode.
