High-Power Laser Performance of Yb:YAl3(BO3)4 Crystals Cut Along the Crystallographic Axes |
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| Authors: | Junhai Liu Mateos X. Huaijin Zhang Jing Li Jiyang Wang Petrov V. |
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| Affiliation: | Max-Born-Inst. for Nonlinear Opt. & Ultrafast Spectrosc., Berlin; |
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| Abstract: | High-power continuous-wave laser operation near 1 mum was demonstrated at room temperature with c-cut and a-cut Yb:YAl3(BO3)4 crystals end-pumped by a fiber-coupled diode laser. Using a 2-mm-thick c-cut crystal, 10.6 W of output power was generated with an optical-to-optical efficiency of 65% and a slope efficiency of 72%. The complex polarization state of the generated laser radiation was also studied. With a 2-mm-thick a-cut crystal, sigma-polarized laser oscillation was obtained, producing a maximum output power of 8.1 W; the optical-to-optical and slope efficiencies were 56% and 61%, respectively. Complete absorption and emission cross section spectra of the Yb:YAl3(BO3) 4 crystal were also derived, revealing very strong anisotropy of the spectroscopic properties |
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