1.3-2.0μm光参量振荡的实验研究

本文首先阐述光参量振荡器的调谐原理及其温度调谐的计算.接着讨论研制光参量振荡器的若干技术问题.最后给出信号单谐光参量振荡的实验结果.波长谐范围为1.3—2.0μm.当波长调谐到1.9μm且工作重复率为10PPS时,输出能量为0.37mJ/脉冲.

EXPERIMENTAL STUDY OF A 1.3-2.0 μm OPTICAL PARAMETRIC OSCILLATOR(OPO)

This paper describes the tuning principle and the experimental technique of OPO.Temperature tuning curves of LiNbO3 crystal OPO are calculated,and the experimental results of singly-resonant parametric LiNbO3 are shown.The tuning range of the signal wavelength was measured to be 1.3-2.0μm.The output energy at 1.9μm was 0.37mJ/pulse at 10pps.The device is a temperature tuned singly-resonant LiNbO3 OPO pumped by a Q-Switched 1.06μm Nd:YAG laser.The parametric oscillator cavity mirrors are designed for the transmittivity T≥90% at 1.06μm,and the reflectivity R≥97% at 1.3-2.0μm.The LiNbO3 crystal,with a length of and the phase matching angle 6 of 50°,was coated with an anti-reflective layer(T≥80% at 1.06-2.0μm).The crystal was mounted in the oven with the temperature controlling accuracy of ±0.05℃.The tuning range of the signal wavelength was measured to be 1.3-2.0μm and the corresponding temperature range of the LiNbO3 crystal was 130°-250℃,The output energy at l,9μm was 0.37 mJ/pulse at 10pps,