Horwitz P
Appl Opt. 1976 Jan 1;15(1):167-78. doi: 10.1364/AO.15.000167.
A previously developed technique for the calculation of modes of perfectly aligned unstable resonators in the limit of large Fresnel number is here extended to include effects of misalignment. It is shown how asymptotic techniques may be employed to simplify the calculation of near- and far-field patterns produced by such modes. The basic conclusion is that rectangular aperture unstable resonators are quite insensitive to misalignment, in the sense that the lowest-loss mode continues to be essentially diffraction limited as long as the feedback mirror remains well within the output beam.
一种先前开发的用于计算大菲涅尔数极限下完全对准的不稳定谐振器模式的技术在此扩展到包括未对准的影响。展示了如何采用渐近技术来简化由此类模式产生的近场和远场图案的计算。基本结论是，矩形孔径不稳定谐振器对未对准相当不敏感，即只要反馈镜保持在输出光束内，最低损耗模式仍基本上受衍射限制。
