Sub-40-fs diode-pumped ytterbium-doped mixed rare-earth calcium oxoborate laser
We present a detailed comparative investigation of the continuous-wave and mode-locked laser performance of a mixed rare-earth calcium oxoborate crystal, Yb:(Gd,Y)Ca<sub>4</sub>O(BO<sub>3</sub>)<sub>3</sub>, abbreviated as Yb:(Gd,Y)COB, for all three principal optical polarizations. Pumped by a low-power, single-transverse-mode, fiber-coupled laser diode at 976 nm, the Yb:(Gd,Y)COB laser generated soliton pulses as short as 32 fs at 1052.4 nm via soft-aperture Kerr-lens mode-locking, delivering an average output power of 51 mW at ∼66.2 MHz for light polarization <b><i>E</i></b> || <b><i>Z</i></b>. For light polarization <b><i>E</i></b> || <b><i>Y</i></b>, slightly longer (34 fs) pulses were directly generated at 1053.7 nm, with a higher average output power of 86 mW at ∼66.7 MHz. To the best of our knowledge, these results represent the shortest pulses ever achieved from any Yb<sup>3+</sup>-doped borate crystal.
Authors
- Zhoubin Lin (ORCID: https://orcid.org/0000-0003-3579-8297)
- Hsing-Chih Liang (ORCID: https://orcid.org/0000-0003-4361-0629)
- Ge Zhang (ORCID: https://orcid.org/0000-0003-4008-9962)
- Valentin Petrov (ORCID: https://orcid.org/0000-0001-7247-6145)
- Pavel Loiko
- Lizhen Zhang (ORCID: https://orcid.org/0000-0003-1606-6824)
- Weidong Chen (ORCID: https://orcid.org/0000-0002-9802-2165)
- Haifeng Lin (ORCID: https://orcid.org/0000-0001-5256-3292)
- Huang-Jun Zeng (ORCID: https://orcid.org/0009-0008-6279-3727)
- Xavier Mateos (ORCID: https://orcid.org/0000-0003-1940-1990)
- Zhang-Lang Lin
Institutions
- National Yang Ming Chiao Tung University (TW)
- Chinese Academy of Sciences (CN)
- Fujian Institute of Research on the Structure of Matter (CN)
- Universitat Rovira i Virgili (ES)
- Umeå University (SE)
- Université de Caen Normandie (FR)
Publication Details
- Journal
- Optics Express
- Published
- 2025-04-08
- DOI
- https://doi.org/10.1364/oe.558581
- Primary Topic
- Solid State Laser Technologies
- Type
- article
- Field-Weighted Citation Impact
- 0.00