finesse.components.cavity.Cavity.m

property Cavity.m

The stability of the cavity, in both planes, given by the \(m\)-factor:

\[m = \frac{A + D}{2}, \]

where \(A\) and \(D\) are the relevant entries of the cavity round-trip ABCD matrix. The cavity is stable if the following condition is satisfied:

\[-1 \leq m \leq 1. \]

Getter

Returns a numpy.ndarray of the cavity stability in the tangential and sagittal planes, respectively (read-only).