InAs/GaSb superlattice SESAM mode-locked fluoride fiber laser at 2.8 µm
We demonstrate a mode-locked fluoride fiber laser operating at 2.8 µm using an InAs/GaSb superlattice (SL) semiconductor saturable absorber mirror (SESAM). Z-scan measurements show that the SL saturable absorber layer possesses off-bandgap nonlinearity near 2.8 µm, with a saturation fluence of 15.9 µJ/cm<sup>2</sup>, a single-pass modulation depth of 2.4%, and a damage threshold of 10.4 mJ/cm<sup>2</sup>. Using this high-damage-threshold SESAM, we achieved a maximum average output power of 1.16 W from the 2.8 µm mode-locked Er:ZBLAN fiber laser, with a pulse duration of 28.1 ps. Continuous mode-locking operation at an average power of 224 mW was sustained for 36 h without interruption, demonstrating the reliability of the InAs/GaSb SL SESAM for the development of mid-infrared mode-locked fluoride fiber lasers.
Authors
- Xiabing Zhou (ORCID: https://orcid.org/0009-0000-5442-4069)
- Guoqiang Xie (ORCID: https://orcid.org/0000-0001-8102-9638)
- Zhipeng Qin (ORCID: https://orcid.org/0000-0002-7250-7818)
- Changjing Bao
Publication Details
- Journal
- Optics Letters
- Published
- 2024-10-17
- DOI
- https://doi.org/10.1364/ol.539195
- Citations
- 3
- Primary Topic
- Advanced Fiber Laser Technologies
- Type
- article
- Field-Weighted Citation Impact
- 1.01
Funders
- National Natural Science Foundation of China
- Shanghai Municipal Education Commission
- Fundamental Research Funds for the Central Universities