低阈值Nd:YAG激光器腔设计及输出特性研究

Low Threshold Nd:YAG Laser Cavity Design and Output Characteristics

结合ABCD矩阵及谐振腔稳区理论,设计了一台全国产化低阈值Nd:YAG固体激光器。通过对50mm、80mm和100mm三种激光谐振腔腔长的激光输出曲线研究,选出了80mm的最佳腔长;对比平面输出镜和凹面曲率半径为200mm的平凹输出镜的激光输出曲线,得出曲率半径为200mm平凹输出镜具有高的激光输出效率和低的出光阈值功率,最后采用透过率为5%平凹输出镜,最终获得连续光出光阈值功率低至278mW,最高输出功率496mW,光-光转化效率24.8%,中心波长1064nm的低阈值高效率稳定运转的Nd:YAG全固态激光器。

Based on the theory of ABCD matrix and resonator stability region, we have designed a nationally produced low threshold Nd：YAG solid state laser. By studying the laser output curves of three laser resonator with 50 mm, 80 mm and 100 mm, the optimum cavity length of 80 mm is selected, and the laser output curve of the flat concave output mirror is compared with the plane output mirror and the concave curvature radius of 200 mm, and the high laser output efficiency and low light output threshold of the 200 mm flat concave output mirror are obtained. In the end, the transmission rate is 5% flat concave output mirror, and the Nd：YAG all solid state laser with low threshold power of 278 mW, 496 mW, light light conversion efficiency and low threshold high efficiency and high efficiency at the center wavelength 1064 nm is finally obtained.