期刊
OPTICS AND LASER TECHNOLOGY
卷 155, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.optlastec.2022.108367
关键词
Nonlinear multimode interference; Harmonic mode -locked; Fiber optics components; Ultrashort pulses
资金
- Science and Technology Develop-ment Plan Project of Jilin Province [20210201035GX]
- Sci-ence and Technology Research Project of Jilin Provincial Department of Education [JJKH20210815KJ]
In this paper, a Gigahertz harmonic mode-locked fiber laser based on microfiber-assisted nonlinear multimode interference is proposed and demonstrated, achieving stable mode-locking at a repetition rate of 1.26 GHz. This provides new insights into implementing high repetition frequency mode-locking fiber lasers.
Light-matter interaction can be strongly enhanced in tiny core fibers, and it holds significant potential for stable harmonic mode-locking at gigahertz and a higher repetition rate. In this paper, we propose and demonstrate a GHz harmonic mode-locked fiber laser based on a microfiber-assisted nonlinear multimode interference (NLMMI), which is achieved by the enhanced mode-filtering of nonlinear self-imaging in multimode fiber with a waist diameter of 12 mu m. A stable mode-locked is achieved with a repetition rate of 1.26 GHz at 1560.15 nm, corresponding to the 22nd harmonic of the fundamental frequency. Our results provide new insight into implementing high repetition frequency mode-locking fiber lasers.
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