Tsuji M, Shigesawa H, Takiyama K
Appl Opt. 1979 May 1;18(9):1334-40. doi: 10.1364/AO.18.001334.
A nonconfocal laser resonator that has output-coupling apertures has been analyzed using the matrix eigenvalue technique. Numerical calculations of eigenvalues and eigenfunctions are performed for the interesting resonator consisting of one plane mirror with a coupling aperture and one spherical mirror. The effects of the coupling aperture are also discussed for several kinds of modes when both the mirror and coupling- aperture Fresnel numbers vary. It is found that the power loss of the TEM(00) mode becomes nearly constant in a finite range of the mirror Fresnel number. In such a range, the major source of a resonator loss is the power coupling through an aperture, and the coupling loss can be estimated independently of the loss caused by the spillover at mirror edges.
利用矩阵本征值技术对具有输出耦合孔径的非共焦激光谐振器进行了分析。对由一个带有耦合孔径的平面镜和一个球面镜组成的有趣谐振器进行了本征值和本征函数的数值计算。当镜面菲涅耳数和耦合孔径菲涅耳数都变化时，还讨论了耦合孔径对几种模式的影响。结果发现，在镜面菲涅耳数的有限范围内，TEM(00)模的功率损耗几乎保持恒定。在这样的范围内，谐振器损耗的主要来源是通过孔径的功率耦合，并且可以独立于镜面边缘溢出引起的损耗来估计耦合损耗。
