Effect of the gain medium position on the external second harmonic generation conversion efficiency

Li Jiaqi; Feng Guoying; Deng Guoliang; Chen Yongfu; Zhou Shouhuan

doi:10.11884/HPLPB201830.170452

Volume 30 Issue 4

Apr. 2018

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Li Jiaqi, Feng Guoying, Deng Guoliang, et al. Effect of the gain medium position on the external second harmonic generation conversion efficiency[J]. High Power Laser and Particle Beams, 2018, 30: 041002. doi: 10.11884/HPLPB201830.170452

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Li Jiaqi, Feng Guoying, Deng Guoliang, et al. Effect of the gain medium position on the external second harmonic generation conversion efficiency[J]. High Power Laser and Particle Beams, 2018, 30: 041002. doi: 10.11884/HPLPB201830.170452

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Effect of the gain medium position on the external second harmonic generation conversion efficiency

doi: 10.11884/HPLPB201830.170452

1.
Institute of Laser and Micro/Nano Engineering, College of Electronics and Information Engineering, Sichuan University, Chengdu 610064, China
2.
Department of Electrophysics, National Chiao Tung University, Taiwan Hsinchu 30010, China
3.
North China Research Institute of Electro-Optics, Beijing 100015, China

Received Date: 2017-11-09
Rev Recd Date: 2017-12-27
Publish Date: 2018-04-15

Abstract

Abstract

The effect of the gain medium position in the resonator on the external second harmonic generation (SHG) conversion efficiency was studied. A MgO-doped periodically poled LiNbO₃ crystal (MgO: PPLN) was utilized to achieve a 532-nm green-light laser outside the resonator of a mode-locked diode-pumped Nd: YVO₄ 1064-nm laser. We theoretically and experimentally verified that increasing the mirror/crystal separation could reduce the longitudinal mode number, narrow the linewidth and stabilize the mode locked pulse owing to the spatial burning hole effect. These phenomena would further affect the SHG conversion efficiency.The experimental results show that, increasing the mirror/crystal separation could promote the SHG conversion efficiency with the fixed focus length, especially at the higher pump power. The theoretical analysis and experimental results have reference significance for improving the SHG efficiency of the external end-pumped mode-locked laser.
- second harmonic generation,
- MgO: PPLN,
- Nd: YVO₄,
- conversion efficiency,
- laser

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References(28)

References

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