finesse.components.cavity.Cavity.mode_separation

property Cavity.mode_separation

The mode separation frequency of the cavity in both planes.

This is defined by,

$$\delta f = \begin{cases} \frac{\psi_{\mathrm{rt}}}{2\pi} \Delta f, & \text{if } \psi_{\mathrm{rt}} \leq \pi\\ (1 - \frac{\psi_{\mathrm{rt}}}{2\pi}) \Delta f, & \text{if } \psi_{\mathrm{rt}} > \pi, \end{cases}$$

where $\psi_{\mathrm{rt}}$ is the accumulated round-trip Gouy phase and $\Delta f$ is the FSR of the cavity.

Getter

Returns a numpy.ndarray of the mode separation frequency in the tangential and sagittal planes, respectively. (read-only).