Multi-repetition-rate mode-locking of a Yb:LuGG waveguide laser
We report on the development of a continuous-wave mode-locked Yb:LuGG waveguide laser fabricated via femtosecond laser inscription. The laser operates near 1036 nm with tunable repetition rates of 192 MHz and 532 MHz, utilizing a single-walled carbon nanotube saturable absorber mirror for mode-locking. By precisely adjusting a piezo-driven air gap between the output coupler and the waveguide facet, and fine-tuning the laser mode area on the absorber using an intracavity lens pair, we achieved stable mode-locked operation at both repetition rates without Q-switching instabilities. The optimized laser delivers maximum average output powers of 113 mW with a pulse duration of 1.18 ps at 192 MHz, and 115 mW with a pulse duration of 968 fs at 532 MHz, demonstrating robust and efficient ultrafast pulse generation in a compact configuration.
Authors
- Seong-Eun Lim
- Javier R. Vázquez de Aldana (ORCID: https://orcid.org/0000-0002-5264-8525)
- Fabıan Rotermund (ORCID: https://orcid.org/0000-0001-9053-3916)
- Carolina Romero (ORCID: https://orcid.org/0000-0002-6088-7673)
- Weidong Chen (ORCID: https://orcid.org/0000-0002-9802-2165)
- Deok Woo Kim (ORCID: https://orcid.org/0000-0002-1763-454X)
- Xavier Mateos (ORCID: https://orcid.org/0000-0003-1940-1990)
Institutions
- Korea Advanced Institute of Science and Technology (KR)
- Universidad de Salamanca (ES)
- Chinese Academy of Sciences (CN)
- Fujian Institute of Research on the Structure of Matter (CN)
- Universitat Rovira i Virgili (ES)
Publication Details
- Journal
- Optics Letters
- Published
- 2025-06-17
- DOI
- https://doi.org/10.1364/ol.566491
- Citations
- 1
- Primary Topic
- Advanced Fiber Laser Technologies
- Type
- article
- Field-Weighted Citation Impact
- 1.25
Funders
- Ministerio de Ciencia, Innovación y Universidades
- National Research Foundation of Korea
- Korea Institute of Energy Technology Evaluation and Planning