Suppressing the preferential o-polarization oscillation in a high power Nd:YVO4 laser with wedge laser crystal |
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作者姓名: | 郑耀辉 周海军 王雅君 邬志强 |
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基金项目: | Project supported by the National High Technology Research and Development Program of China (Grant No. 2011AA030203), the National Basic Research Program of China (Grant No. 2010CB923101), the National Natural Science Foundation of China (Grant No. 61008001), and the Natural Science Foundation of Shanxi Province, China (Grant No. 2011021003-2). |
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摘 要: | We observe the phenomenon of priority oscillation of the unexpected a-polarization in high-power Nd:YVO4 ring laser. The severe thermal lens of the a-polarized lasing, compared with the n-polarized lasing, is the only reason for the phenomenon. By designing a wedge Nd:YVO4 crystal as the gain medium, the unexpected a-polarization is completely suppressed in the entire range of pump powers, and the polarization stability of the expected zc-polarized output is enhanced. With the output power increasing from threshold to the maximum power, no a-polarization lasing is observed. As a result, 25.3 W of stable single-frequency laser output at 532 nm is experimentally demonstrated.
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关 键 词: | Nd YVO4激光器 高功率 激光晶体 极化 楔形 振荡 Nd YVO4晶体 o型 |
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