Generation of gigahertz-repetition-rate femtosecond vortex beams by an optical parametric oscillator
The generation of GHz-repetition-rate femtosecond vortex beams is reported for the first time, to the best of our knowledge. A self-developed GHz-repetition-rate Kerr-lens mode-locked Yb:CYA laser was used to pump an optical parametric oscillator (OPO). Hermite-Gaussian (HG) beams with tunable orders from the 1st to the 7th were generated in the OPO and subsequently converted into vortex beams of the corresponding orders outside the cavity. The generated vortex beams exhibit a repetition rate of 1.02 GHz, a wavelength tuning range spanning 1.47-1.66 μm, and a pulse duration ranging from ~100 fs to ~200 fs. This work provides a flexible and reliable approach for generating GHz-repetition-rate femtosecond vortex beams and offers a high-performance optical source for relevant applications.
Authors
- Hai Wang (ORCID: https://orcid.org/0000-0002-4192-5363)
- Jia-Ji Zhu (ORCID: https://orcid.org/0000-0002-1328-356X)
- Yue Shi (ORCID: https://orcid.org/0000-0002-0033-0478)
- Guoqiang Xie (ORCID: https://orcid.org/0000-0001-8102-9638)
- Hui Tong (ORCID: https://orcid.org/0000-0001-7734-9532)
- Wenlong Tian (ORCID: https://orcid.org/0000-0002-2965-0811)
- Jinglan Huo (ORCID: https://orcid.org/0009-0009-0583-1413)
- Bin Zhang (ORCID: https://orcid.org/0000-0003-0633-2930)
- Zhiyi Wei (ORCID: https://orcid.org/0000-0003-1757-8725)
- Zheng Li (ORCID: https://orcid.org/0000-0002-8761-6996)
Institutions
- Xidian University (CN)
- Sun Yat-sen University (CN)
- Shanghai Jiao Tong University (CN)
- Shaanxi University of Technology (CN)
- Chinese Academy of Sciences (CN)
Publication Details
- Journal
- Optics Letters
- Published
- 2025-11-04
- DOI
- https://doi.org/10.1364/ol.581679
- Citations
- 1
- Primary Topic
- Orbital Angular Momentum in Optics
- Type
- article
- Field-Weighted Citation Impact
- 1.25