finesse.components.cavity.Cavity.gouy

property Cavity.gouy

The accumulated round-trip Gouy phase of the cavity in both planes (in degrees).

This is given by,

\[\psi_{\mathrm{rt}} = 2\,\arccos{\left( \mathrm{sgn}(B) \sqrt{g} \right)}, \]

where \(B\) is the corresponding element of the round-trip ABCD matrix and \(g\) is the cavity stability parameter returned by Cavity.g.

Getter:

Returns a numpy.ndarray of the accumulated round-trip Gouy phase in the tangential and sagittal planes, respectively. (read-only).