【摘要】 给出了一种基于高斯光束的平凹激光腔对准方法。在高斯准直光束后加一透镜系统,恰当地调整准直高斯光束到某一种汇聚发散的状态。在这种状态下,可使由平凹腔凹面镜和平面镜反射回来的光斑直径大小相仿,解决了不加透镜系统时,两反射回来光斑直径相差很大,难于对准的问题,提高两光斑的对准精度。实验使用束腰为0.6 mm的氦氖光,其后加一优化好的透镜系统,在889 mm的距离下,对凹面镜曲率半径为50 mm的平凹腔进行对准。得到由凹面镜和平面镜反射回来的光斑直径分别为4.8 mm和5.1 mm,平凹腔的角度对准精度达到了3.18′。对准好的腔体在点亮LD后,均能出基模光斑。实验结果与理论分析相符,证明了该对准方法结构简单,执行方便。更多还原

【Abstract】 A adjusting method of optically plane-concave laser resonator based on Gaussian beam is presented when the pump source is absent.A parallel incidence Gaussian beam through a lens system is used to hit on the concave mirror and the plane mirror of the plane-concave resonator.The importing of the lens system is to improve the adjusting precision of the beams reflected from the concave and the plane mirror by causing one beam size similar to another,because it can not get similar beam size reflected when a parallel incidence Gaussian beam is directly hit on the concave and the plane mirrors of the resonator.In the experiment,a He-Ne laser with waist of 0.6 mm is utilized to adjusting a plane-concave resonator with a concave mirror in a radius of 50 mm at measuring distance of 889 mm.The beam sizes reflected from the concave mirror and the plane mirror are 48 mm and 5.1 mm,respectively.The angle adjusting precision of the plane-concave resonator is 3.18′.TEM₀₀ mode can be abtained by pumping the resonator module that has been adjusted with a LD.The results show that the adjusting method is simple and flexible,and can be used to separate the laser resonator and the pump source module.更多还原