Ganiel U, Silberberg Y
Appl Opt. 1975 Feb 1;14(2):306-9. doi: 10.1364/AO.14.000306.
The problem of the stability of the Gaussian modes of an optical resonator of large mirror apertures filled with a medium having a gain and index profile is considered. Recent results by other investigators are carefully examined in an attempt to clarify a discrepancy between them. It is found that the modes of the resonator are stable if the gain is highest on the resonator axis. When the gain increases with distance from the resonator axis, one can calculate a Gaussian eigenmode,:but this mode is unstable in the sense that any deviation from the exact physical parameters defining the mode will cause its divergence to an infinite spot size.
研究了填充有具有增益和折射率分布的介质的大镜面孔径光学谐振器高斯模式的稳定性问题。仔细研究了其他研究者最近的结果，试图澄清它们之间的差异。发现如果增益在谐振器轴上最高，则谐振器的模式是稳定的。当增益随距谐振器轴的距离增加时，可以计算出一个高斯本征模式，但从定义该模式的精确物理参数有任何偏差都会导致其发散到无限光斑尺寸的意义上来说，这个模式是不稳定的。
