High-efficiency and high-brightness circular-clad, large-size, rectangular core crystalline waveguide Yb:YAG laser
We report what we believe to be a novel circular-clad large-size rectangular core crystalline waveguide Yb:YAG laser. The waveguide has a rectangular core of Yb:YAG with 400 × 400 μm<sup>2</sup> and a thin rod-shaped cladding of Er:YAG with a diameter of 1.2 mm and a length of 65 mm. The circular-clad structure has improved the pump absorption efficiency of the waveguide. A concave-convex cavity is designed to overcome the power limitation of thermal lens effect on the large-size rectangular core single-mode waveguide. A waveguide oscillator obtains a 1030 nm laser with an average power of 110 W and a beam quality factor of <i>M</i><sub>x</sub><sup>2</sup>×<i>M</i><sub>y</sub><sup>2 </sup>= 1.07 × 1.05, with optical-optical efficiency and slope efficiency of 54% and 67%, respectively. The laser performance is attributed to the double-clad structure and the good thermal management. The results confirm that the waveguide has high potential in power expansion and pulse laser amplification.
Authors
- Lei Huang (ORCID: https://orcid.org/0000-0002-9346-7253)
- Yunpeng Huang (ORCID: https://orcid.org/0000-0002-8710-9062)
- Shuai Li (ORCID: https://orcid.org/0009-0009-7690-4608)
- Qiang Li (ORCID: https://orcid.org/0000-0001-8891-260X)
- Zhanda Zhu (ORCID: https://orcid.org/0000-0001-7433-7384)
- Xin Nie (ORCID: https://orcid.org/0000-0001-7120-2804)
- Jing Zhao (ORCID: https://orcid.org/0009-0009-5804-4018)
Institutions
- Ministry of Education of the People's Republic of China (CN)
- Beijing Institute of Optoelectronic Technology (CN)
Publication Details
- Journal
- Optics Letters
- Published
- 2025-02-05
- DOI
- https://doi.org/10.1364/ol.551436
- Citations
- 4
- Primary Topic
- Photonic Crystal and Fiber Optics
- Type
- article
- Field-Weighted Citation Impact
- 2.92
Funders
- National Natural Science Foundation of China
- Beijing Municipal Natural Science Foundation