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基于包括子午和弧矢方向完整的4×4旁轴光线传输矩阵,建立了非共面谐振腔激光陀螺整体环绕传输矩阵.根据该矩阵,计算q参量矩阵,代入实际参量,分析并仿真计算了某型非共面谐振腔环形激光陀螺的复杂象散,得到了光路上任意位置光斑尺寸.实验采用CCD测量了该型激光陀螺输出光不同位置的光斑尺寸,通过多点测量值双曲线拟合的方法得出束腰宽度,仿真计算和实验结果一致.采用高斯光束理论,根据光场分布、光阑尺寸和位置确定衍射损耗,设计出合适的光阑方案,即将光阑设置在束腰位置,其形状为圆形,尺寸与束腰比值为2左右.实验证明该方案保证了该型非共面谐振腔环形激光陀螺单横模工作.
Based on the complete 4 × 4 paraxial ray transmission matrix including the meridional and sagittal directions, a non-coplanar resonant cavity laser gyroscope global transmission matrix is established. According to this matrix, the q-parameter matrix is calculated and substituted into the actual parameters, and analyzed and simulated The complex astigmatism of a non-coplanar resonator ring laser gyro was obtained, and the spot size of light beam at any position was obtained.The spot size of the laser light gyro with different positions was measured by CCD and hyperbolic fitting , The simulation results are consistent with the experimental results.Using Gaussian beam theory, the diffraction loss is determined according to the distribution of the light field, the size and the position of the diaphragm, and a suitable diaphragm scheme is designed, that is, the diaphragm is set at the position of the waist , The shape of a circle, size and beam waist ratio of about 2. Experiments show that the program ensures that the non-coplanar resonator ring laser gyro single transverse mode work.