High-Energy Injection-Seeded Single-Frequency Er:YAG Laser at 1645 nm Pumped by a 1532 nm Fiber Laser
Jiaze Wu,
Youlun Ju,
Jiawei Fan,
Yiming Zhao,
Kun Yang,
Lijie Geng,
Yuanxue Cai,
Lei Song,
Yaming Zhuang,
Shuyun Wu,
Xiaoming Duan
Affiliations
Jiaze Wu
National Key Laboratory of Laser Spatial Information, Harbin Institute of Technology, Harbin 150001, China
Youlun Ju
National Key Laboratory of Laser Spatial Information, Harbin Institute of Technology, Harbin 150001, China
Jiawei Fan
National Key Laboratory of Laser Spatial Information, Harbin Institute of Technology, Harbin 150001, China
Yiming Zhao
Beijing Research Institute of Telemetry, Beijing 100001, China
Kun Yang
School of Electronic and Information, Henan Province Optoelectronic Sensing and Information Processing Engineering Technology Research Center, Zhengzhou University of Light Industry, Zhengzhou 450001, China
Lijie Geng
School of Electronic and Information, Henan Province Optoelectronic Sensing and Information Processing Engineering Technology Research Center, Zhengzhou University of Light Industry, Zhengzhou 450001, China
Yuanxue Cai
Research Center for Photonics and Advanced Sensing Technology, Tianjin University of Science and Technology, Tianjin 300457, China
Lei Song
Norla Institute of Technical Physics, Chengdu 610041, China
Yaming Zhuang
Norla Institute of Technical Physics, Chengdu 610041, China
Shuyun Wu
Norla Institute of Technical Physics, Chengdu 610041, China
Xiaoming Duan
National Key Laboratory of Laser Spatial Information, Harbin Institute of Technology, Harbin 150001, China
A single-frequency, Q-switched Er:YAG laser, pumped by a 1532 nm fiber laser, has been demonstrated. At the pulse repetition frequency (PRF) of 200 Hz, the maximum single-frequency laser of 5.5 mJ is attained, and, correspondingly, the pulse width is 212 ns. Using the heterodyne technique, the single-frequency laser spectrum’s full width at half maximum is determined to be 2.73 MHz. The experimental results show that the single-frequency laser has excellent beam quality factors (M2) of 1.18 and 1.21.
