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Sub-40-fs diode-pumped ytterbium-doped mixed rare-earth calcium oxoborate laser

Year: 2025
Type: article
Abstract: 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 4 O(BO 3 ) 3 , 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 E || Z . For light polarization E || Y , 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 3+ -doped borate crystal.
DOI: 10.1364/oe.558581
Authors: Huang-Jun Zeng, Zhang-Lang Lin, Haifeng Lin, Pavel Loiko, Lizhen Zhang, Zhoubin Lin, Hsing-Chih Liang, Xavier Mateos, Valentin Petrov, Ge Zhang, Weidong Chen
Institutions: Chinese Academy of Sciences, Fujian Institute of Research on the Structure of Matter, Umeå University, Université de Caen Normandie, National Yang Ming Chiao Tung University, Universitat Rovira i Virgili
Language: English
Open Access status: gold
Estimated APC paid: $2,270
Awards: G2215781099, G2984806830, G3899672167, G4882808422, G5853987389, G7088110129, G764530629
OpenAlex ID: W4409273607
FWCI:
Cites: 24
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Related to: 10