Continuous-wave and passively mode-locked operation of Yb:Ca3Gd2(BO3)4 laser

Huang-Jun Zeng; Zhang-Lang Lin; Zhongben Pan; Pavel Loiko; Xavier Mateos; Haifeng Lin; Wen-Ze Xue; Ge Zhang; Valentin Petrov; Li Wang; Weidong Chen

doi:10.1117/12.2610378

4 March 2022 Continuous-wave and passively mode-locked operation of Yb:Ca₃Gd₂(BO₃)₄ laser

Huang-Jun Zeng, Zhang-Lang Lin, Zhongben Pan, Pavel Loiko, Xavier Mateos, Haifeng Lin, Wen-Ze Xue, Ge Zhang, Valentin Petrov, Li Wang, Weidong Chen

Author Affiliations +

Proceedings Volume 11980, Solid State Lasers XXXI: Technology and Devices; 119800M (2022) https://doi.org/10.1117/12.2610378
Event: SPIE LASE, 2022, San Francisco, California, United States

Abstract

We report on the continuous-wave (CW) and Kerr-lens mode-locked (KLM) operation of an ytterbium (Yb³⁺) doped orthorhombic calcium rare-earth borate Yb:Ca₃Gd₂(BO₃)₄ (Yb:GdCB) disordered crystal. A high quality 10 at.% Yb:GdCB crystal was grown by the Czochralski method. An X-shaped astigmatically compensated linear cavity was employed for evaluating the CW and KLM laser performance of an a-cut (sp. gr. Pnma) Yb:GdCB crystal. Pumping with a single-transverse mode, fiber-coupled diode laser at 976 nm, a maximum CW output power of 548 mW was obtained at 1049 nm with a slope efficiency of 67.8% and a linear laser polarization (E || b). A broad wavelength tuning range of ~88 nm (1001 – 1089 nm) was achieved in the CW regime. Stable KLM operation was initiated and stabilized by a semiconductor saturable absorber mirror (SESAM). Nearly Fourier-transform-limited pulses as short as 33 fs were generated at a central wavelength of 1055.3 nm with an average output power of 98 mW for a pulse repetition rate of ~67.3 MHz.

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Huang-Jun Zeng, Zhang-Lang Lin, Zhongben Pan, Pavel Loiko, Xavier Mateos, Haifeng Lin, Wen-Ze Xue, Ge Zhang, Valentin Petrov, Li Wang, and Weidong Chen "Continuous-wave and passively mode-locked operation of Yb:Ca₃Gd₂(BO₃)₄ laser", Proc. SPIE 11980, Solid State Lasers XXXI: Technology and Devices, 119800M (4 March 2022); https://doi.org/10.1117/12.2610378

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