High power single-longitudinal-mode CO <sub>2</sub> laser with a frequency-tunable range of 0.29 GHz
A frequency-tunable and single-longitudinal-mode master oscillator power amplifier system based on a radio-frequency (RF)-excited waveguide CO<sub>2</sub> laser with three-stage amplification was demonstrated. The continuous tuning range of 0.29 GHz within one longitudinal mode spacing of the RF-excited waveguide CO<sub>2</sub> laser was realized by adjusting the cavity length in closed loop. The linewidth of the CO<sub>2</sub> laser was 3.9 MHz, and the maximal output power was 23.7 W at the center frequency of 9P (20) (9.56 μm). An amplification factor of 17 was obtained by adopting three RF-excited seven-channel folded-waveguide CO<sub>2</sub> amplifiers. This laser system will be a good candidate for coherent detection lidar.
Authors
- Mingkun Liu
- Donglei Wang (ORCID: https://orcid.org/0000-0002-5888-7439)
- Wenning Xu
- Liemao Hu
- Changjun Ke
- Fangjin Ning
- Zhiyong Li (ORCID: https://orcid.org/0000-0001-9398-7606)
- Hui Li (ORCID: https://orcid.org/0000-0002-2689-2241)
- Rongqing Tan (ORCID: https://orcid.org/0000-0002-4220-2183)
- Gaofeng Wang (ORCID: https://orcid.org/0009-0006-4436-5628)
Institutions
- Chinese Academy of Sciences (CN)
- University of Chinese Academy of Sciences (CN)
Publication Details
- Journal
- Optics Letters
- Published
- 2025-12-19
- DOI
- https://doi.org/10.1364/ol.582435
- Primary Topic
- Laser Design and Applications
- Type
- article
- Field-Weighted Citation Impact
- 0.00