Suppressing the preferential σ-polarization oscillation in a high power Nd：YVO4 laser with wedge laser crystal

doi:10.1088/1674-1056/22/8/084207

中国物理B ›› 2013, Vol. 22 ›› Issue (8): 84207-084207.doi: 10.1088/1674-1056/22/8/084207

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇下一篇

Suppressing the preferential σ-polarization oscillation in a high power Nd：YVO₄ laser with wedge laser crystal

郑耀辉, 周海军, 王雅君, 邬志强

State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Opto-Electronics, Shanxi University, Taiyuan 030006, China

收稿日期:2012-11-23 修回日期:2013-02-27 出版日期:2013-06-27 发布日期:2013-06-27
基金资助:
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).

Suppressing the preferential σ-polarization oscillation in a high power Nd：YVO₄ laser with wedge laser crystal

Zheng Yao-Hui (郑耀辉), Zhou Hai-Jun (周海军), Wang Ya-Jun (王雅君), Wu Zhi-Qiang (邬志强)

State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Opto-Electronics, Shanxi University, Taiyuan 030006, China

Received:2012-11-23 Revised:2013-02-27 Online:2013-06-27 Published:2013-06-27
Contact: Zheng Yao-Hui E-mail:yhzheng@sxu.edu.cn
Supported by:
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).

摘要/Abstract

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.

关键词: high-power laser, single-frequency, thermal effect, polarization selection

Abstract: 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.

Key words: high-power laser, single-frequency, thermal effect, polarization selection

中图分类号: (Diode-pumped lasers)

42.55.Xi

42.60.Da (Resonators, cavities, amplifiers, arrays, and rings) 42.60.Lh (Efficiency, stability, gain, and other operational parameters) 42.60.Pk (Continuous operation)

郑耀辉, 周海军, 王雅君, 邬志强. Suppressing the preferential σ-polarization oscillation in a high power Nd：YVO₄ laser with wedge laser crystal[J]. 中国物理B, 2013, 22(8): 84207-084207.

Zheng Yao-Hui (郑耀辉), Zhou Hai-Jun (周海军), Wang Ya-Jun (王雅君), Wu Zhi-Qiang (邬志强). Suppressing the preferential σ-polarization oscillation in a high power Nd：YVO₄ laser with wedge laser crystal[J]. Chin. Phys. B, 2013, 22(8): 84207-084207.

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Suppressing the preferential σ-polarization oscillation in a high power Nd：YVO₄ laser with wedge laser crystal

Suppressing the preferential σ-polarization oscillation in a high power Nd：YVO₄ laser with wedge laser crystal

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