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).