同轴放电环形增益区谐振腔镜面的场分布  

Optic field distribution at the mirror of annular resonator of coaxial discharge

作　　者：高珊[1] 李育德[1] 刘治涛[1] 

机构地区：[1]四川大学电子信息学院,成都610064

出　　处：《强激光与粒子束》2007年第7期1061-1065,共5页High Power Laser and Particle Beams

基　　金：国家自然科学基金资助课题(60278020)

摘　　要：对几类环形增益区谐振腔进行了比较,得出利用谐振腔两镜之一的全工作面输出的新型环形增益区谐振腔是适合的谐振腔。提出了一种计算全工作面输出的同轴放电环形增益区谐振腔镜面场分布的方法,利用几何方法对腔镜镜面进行划分,得出了基于菲涅尔-基尔霍夫衍射积分定理的积分区域,并对该区域进行了有限元划分,应用计算机编程计算出了同轴放电环形增益区谐振腔镜面处的光场分布和相位分布。近场分布在环形区中央部分近似地呈高斯分布,且沿径向出现高阶模场分布特点,沿角向无差别。Comparing several kinds of resonators with annular gain media, the new type of muhipass resonator with two annular spherical mirrors which uses an entire working surface output is considered suitable for a kind of high power CO2 laser. A new method for calculating the optic field distribution at the mirror of coaxial discharge laser with annular gain media is proposed. An integral area is obtained using solid geometry based on Fresnel-Kirchoff diffractive integral equation, which is divided into finite grids. Then the optic field distribution at the mirror of annular resonator is calculated. Near-field distribution in the middle of the annular area is similar to the Gaussian distribution, and the high-order mode distribution appears along the radius. Azimuthal distribution has no discrimination.

关 键 词：环形增益区 环形谐振腔 有限元 数值计算 光场分布 

分 类 号：TN248[电子电信—物理电子学]