光子学报 ›› 2015, Vol. 44 ›› Issue (8): 819002-0819002.doi: 10.3788/gzxb20154408.0819002

• 非线性光学 • 上一篇    下一篇

三硼酸锂晶体Ⅰ类非临界相位匹配下近红外波段的差频产生

卢一鑫1,2, 白晋涛1   

  1. 1. 西北大学 光子学与光子技术研究所, 西安 710061;
    2. 西安文理学院 应用物理研究所, 西安 710065
  • 收稿日期:2015-02-02 修回日期:2015-04-27 出版日期:2015-08-25 发布日期:2015-05-30
  • 作者简介:卢一鑫(1982-),男,实验师,硕士,主要研究方向为非线性光学、光电子器件.Email:tongy1982@163.com
  • 基金资助:

    国家自然科学基金(No. 61401356)资助

Generation of Near-infrared Radiation by Non-critical Phase-matched Type-Ⅰ Difference-frequency Mixing in a LBO Crystal

LU Yi-xin1,2, BAI Jin-tao1   

  1. 1. Institute of Photonics and photon technology, northwest university, Xi'an 710061, China;
    2. Institute of Applied Physics, Xi'an university, Xi'an 710065, China
  • Received:2015-02-02 Revised:2015-04-27 Online:2015-08-25 Published:2015-05-30

摘要:

利用差频发生器产生波长范围为1.1~2.2 μm的可调谐近红外激光.实验搭建了差频光路系统,以0.56~0.71 μm染料激光器作为泵浦光、1.064 μm的半导体激光器作为信号光,经过三硼酸锂晶体在Ⅰ类相位匹配方式条件下通过温度调谐非临界相位匹配方式差频产生较高功率的近红外激光,在近红外波段测得其平均输出功率在30 mW以上.泵浦光功率为1.2 W、信号光功率为0.31 W时,测得差频波长为1.54 μm的输出功率为35 mW,转化效率达11.7%.该近红外差频发生器具有宽调谐、窄线宽的特点.

关键词: 非线性光学, 差频发生器, 非临界相位匹配, 三硼酸锂晶体, 近红外

Abstract:

The tunable near-infrared laser with wavelength range of 1.1~2.2 μm was generated by the different- frequency generation. In the experiment, the optical system was constituted of tunable dye laser (560~710 nm) as the pump light source and 1.064 μm laser diode as the signal light source, the efficient near-infrared radiation was generated by the temperature-tuned non-critical phase-matched type-Ⅰ difference-frequency mixing in a LBO crystal, and the average output power was measured more than 30 mW during the near-infrared radiation. At 1.54 μm the output power was measured 35 mW in the condition of the 1.2 W of the pump source and 0.31 W of the signal source, and the energy conversion efficiency of 11.7% was achieved.The peculiarity of broadly tunable and narrow spectral bandwidth of the near-infrared of the different-frequency generation has an extensive application.

Key words: Nonlinear optics, Near-infrared radiation, Non-critical phase-matched, LBO crystal, Different-frequency generation

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