High-Energy Injection-Seeded Single-Frequency Er:YAG Laser at 1645 nm Pumped by a 1532 nm Fiber Laser
oleh: Jiaze Wu, Youlun Ju, Jiawei Fan, Yiming Zhao, Kun Yang, Lijie Geng, Yuanxue Cai, Lei Song, Yaming Zhuang, Shuyun Wu, Xiaoming Duan
| Format: | Article |
|---|---|
| Diterbitkan: | MDPI AG 2024-08-01 |
Deskripsi
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 (M<sup>2</sup>) of 1.18 and 1.21.