12.7 mJ travelling-wave amplifier based on Yb:CALGO crystals at 1 kHz
In this paper, we demonstrate, for what we believe is the first time, a quasi-continuous-wave (QCW), one kilohertz, two-stage, double-pass travelling-wave amplifier based on Yb:CALGO crystals. A compact travelling-wave amplifier delivered an amplified pulse energy of 12.7 mJ at the central wavelength of 1038.1 nm. The amplified spectrum featured a full width at half maximum (FWHM) of 5.8 nm. Using a double-pass single-grating compressor, a pulse duration of 281 fs was measured. Owing to effective thermal management, the amplified laser beam profile exhibited a well-defined Gaussian distribution with a beam ellipticity of 0.92, corresponding to a beam quality factor (M<sup>2</sup>) < 1.30 in each stage.
Authors
- Jia-Ji Zhu (ORCID: https://orcid.org/0000-0002-1328-356X)
- Yu Yang (ORCID: https://orcid.org/0000-0001-7430-4259)
- Wenlong Tian (ORCID: https://orcid.org/0000-0002-2965-0811)
- Guoxiang Wang (ORCID: https://orcid.org/0000-0001-5367-7654)
- Fengchen Zhang (ORCID: https://orcid.org/0009-0009-7826-7040)
- Huang Zhou (ORCID: https://orcid.org/0000-0001-9452-5841)
- Yutong Zhang (ORCID: https://orcid.org/0009-0007-6027-3122)
- Yi Shan Wang (ORCID: https://orcid.org/0000-0002-0268-3453)
- Zhiyi Wei (ORCID: https://orcid.org/0009-0004-4615-7190)
Institutions
- Chinese Academy of Sciences (CN)
- Songshan Lake Materials Laboratory (CN)
- FZU ‒ Institute of Physics of the Academy of Sciences of the Czech Republic (CZ)
- Xi'an Institute of Optics and Precision Mechanics (CN)
- University of Chinese Academy of Sciences (CN)
Publication Details
- Journal
- Optics Express
- Published
- 2025-11-26
- DOI
- https://doi.org/10.1364/oe.582445
- Primary Topic
- Solid State Laser Technologies
- Type
- article
- Field-Weighted Citation Impact
- 0.00