Suppressing the preferential σ-polarization oscillation in a high power Nd∶YVO4 laser w

Suppressing the preferential σ-polarization oscillation in a high power Nd∶YVO4 laser with

wedge laser crystal

Zheng Yao-Hui;Zhou Hai-Jun;Wang Ya-Jun;Wu Zhi-Qiang

【期刊名称】《中国物理：英文版》 【年(卷),期】2013(022)008

【摘要】We observe the phenomenon of priority oscillation of the unexpected σ-polarization in high-power Nd∶YVO4 ring laser.The severe thermal lens of the σ-polarized lasing,compared with the π-polarized lasing,is the only reason for the phenomenon.By designing a wedge Nd∶YVO4 crystal as the gain medium,the unexpected σ-polarization is completely suppressed in the entire range of pump powers,and the polarization stability of the expected π-polarized output is enhanced.With the output power increasing from threshold to the maximum power,no σ-polarization lasing is observed.As a result,25.3 W of stable single-frequency laser output at 532 nm is experimentally demonstrated.

【总页数】5页(451-455) 【关键词】

【作者】Zheng Yao-Hui;Zhou Hai-Jun;Wang Ya-Jun;Wu Zhi-Qiang 【作者单位】State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Opto-Electronics, Shanxi University, Taiyuan