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根据光波导短程透镜母线曲率半径与光传输损耗的关系,利用数值计算的方法,通过计算不同母线参数条件下,四种解析解设计的短程透镜母线曲率半径,研究比较了短程透镜卷边对其损耗的影响,得出了短程透镜损耗与其有效区半径关系的曲线图,发现透镜凹面半径一定时,有效区半径越小,即卷边越大时,光传输损耗越小;短程透镜的解析改进解和最优解设计的透镜卷边存在曲率奇点。并由此得出了四种解析解设计的短程透镜有效区半径选取原则及其满足低损耗条件的取值范围。
According to the relationship between the radius of curvature and the optical transmission loss of the short-pass lens, the numerical calculation method was used to calculate the radius of curvature of the short-range lens busbar with four kinds of analytical solutions under different busbar parameters. The results show that when the radius of the concave surface of the lens is constant, the radius of the effective area is smaller, that is, the smaller the transmission loss is, the smaller the transmission loss of the lens is. The analytical improvement of the short-range lens Curvature singularity exists in lens curl of solution and optimal solution. And then the principle of radius selection of the effective area of the short-range lens and the range of values that satisfy the low-loss conditions are derived for the four analytical solutions.