Study of the polarization locking transmission mechanism during the second harmonic generation
This study investigates the transmission mechanism of the beat-frequency signal of the fundamental wave during extra-cavity second harmonic generation (SHG) in Nd:YAG laser. By precisely controlling intracavity anisotropic losses, we observe that the beat-frequency signal in the second harmonic had approximately twice the amplitude of the fundamental wave. Furthermore, the output efficiency of the second harmonic is significantly improved. A theoretical model for the transmission of the fundamental wave's beat-frequency signal in the extra-cavity SHG is developed. For the first time, this study reveals the relationship between the beat frequency of the fundamental wave and second harmonic in extra-cavity SHG, both theoretical and experimental. These findings offer valuable insights for designing high-efficiency extra-cavity SHG systems for isotropic lasers.
Authors
- Pengjian Xie (ORCID: https://orcid.org/0009-0002-3926-0224)
- Jinming Huang (ORCID: https://orcid.org/0000-0001-9621-5652)
- Ge Zhang (ORCID: https://orcid.org/0000-0002-1344-6111)
- Bingxuan Li (ORCID: https://orcid.org/0000-0002-6921-3448)
- Pengfei Zhou (ORCID: https://orcid.org/0009-0004-2095-188X)
- Jianing Li
- Rui Liu (ORCID: https://orcid.org/0009-0006-3229-9854)
Institutions
- Fujian Normal University (CN)
- Tan Kah Kee Innovation Laboratory (CN)
- University of Chinese Academy of Sciences (CN)
Publication Details
- Journal
- Optics Express
- Published
- 2025-02-18
- DOI
- https://doi.org/10.1364/oe.553951
- Citations
- 2
- Primary Topic
- Solid State Laser Technologies
- Type
- article
- Field-Weighted Citation Impact
- 1.46
Funders
- National Natural Science Foundation of China
- Youth Innovation Promotion Association of the Chinese Academy of Sciences
- Chinese Academy of Sciences Key Technology Talent Program