Efficient continuous-wave MgO: PPLN optical parametric oscillator with three-mirror linear cavity

Peng-fei WEI; Yong-chang ZHANG; Jing ZHANG; Yan-min DUAN; Hai-yong ZHU

doi:10.3788/OPE.20192701.0045

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Efficient continuous-wave MgO: PPLN optical parametric oscillator with three-mirror linear cavity

Modern Applied Optics | 更新时间：2020-08-13

- Efficient continuous-wave MgO: PPLN optical parametric oscillator with three-mirror linear cavity
- Optics and Precision Engineering Vol. 27, Issue 1, Pages: 45-50(2019)
- 作者机构：
  
  1.绍兴文理学院数理信息学院，浙江绍兴 312000
  2.温州大学激光与光电子技术研究所，浙江温州 325035
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20192701.0045
  CLC： O437.4
- Received：31 August 2018，
  
  Accepted：08 October 2018，
  
  Published：15 January 2019
- 稿件说明：
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Peng-fei WEI, Yong-chang ZHANG, Jing ZHANG, et al. Efficient continuous-wave MgO: PPLN optical parametric oscillator with three-mirror linear cavity[J]. Optics and precision engineering, 2019, 27(1): 45-50.
DOI：

Peng-fei WEI, Yong-chang ZHANG, Jing ZHANG, et al. Efficient continuous-wave MgO: PPLN optical parametric oscillator with three-mirror linear cavity[J]. Optics and precision engineering, 2019, 27(1): 45-50. DOI： 10.3788/OPE.20192701.0045.

摘要

为了优化MgO: PPLN连续光参量振荡器(OPO)的输出特性，对三镜直腔结构的内腔式OPO系统进行腔结构设计，对其同时输出高效的信号光和闲频光进行研究。采用半导体激光端面抽运Nd: YVO

晶体实现连续的1 064 nm激光为基频光。对比分析了基频激光腔和OPO腔各腔镜分别采用平面镜或平凹镜的三种腔型结构的激光输出特性。基于30.5 μm的极化周期和12.4 W入射抽运功率时，获得了最高输出功率3.92 W(信号光2.6 W和闲频光1.32 W)，转化效率31.6%的激光输出，对应的信号光和闲频光的中心波长分别为1 549 nm和3 394 nm。结果表明三个腔镜均采用平凹镜时，可有效的压缩基频激光腔在MgO: PPLN晶体上的光斑，提升基频激光的功率密度，而且基频激光腔和OPO腔的基模光斑在MgO: PPLN晶体上更好的匹配，从而提升变频效率。

Abstract

In order to optimize the output characteristics of continuous-wave singly resonant MgO: PPLN optical parametric oscillations (OPO)

a compact three-mirror linear cavity structure was designed for efficient signal light and idler light outputs. A diode laser end-pumped Nd: YVO

crystal laser at 1 064 nm was used as the fundamental laser source to derive the OPO in the cavity. Three laser cavities with cavity mirrors chosen from plane mirror or plano-concave mirror were designed for comparison. The simulation results show that the fundamental laser beam could be compressed

and the power density could be improved on the MgO: PPLN crystal if all three cavity mirrors used the plano-concave mirror (named concave-concave-concave cavity in this paper). The frequency conversion efficiency would be improved for better mode matching between the fundamental cavity and the OPO cavity with the concave-concave-concave cavity. A total output power of 3.92 W and conversion efficiency of 31.6% were obtained at the incident pump power of 12.4 W and grating period of 30.5 μm. A 2.6 W light signal with the center wavelength at 1 549 nm and 1.32 W idler light with center wavelength at 3 394 nm were achieved.

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references

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