====== Calcualtion of linewidth and FSR ======

==Parameter==
    * Cavity Length: L= 0.48 m
    * Speed of light: c= 299792458 m/s
    * Finesse: F= 107.000 aus [[https://iqwiki.iqo.uni-hannover.de/doku.php?id=groups:mg:project_ptb-cavity:finesse_assessment_for_vacuum|Finesse assessment for vacuum]]

Freier Spektralbereich:
$$FSR = \frac{c}{2\cdot L} -> FSR = 312.284 MHz$$  

Linienbreite:
$$\delta \nu = \frac{FSR}{F} -> \delta \nu = 2.927,88 Hz $$