A solid glass etalon plate has thickness mm and index

PHYSICS · Multi-part · Fermi University Physics · Optics & Photonics · Interference and diffraction · Interference and diffraction

Optics and Photonics, Ch Multiple-beam interference: thin films, multilayers and the Fabry-Perot etalon

Problem

A solid glass etalon plate has thickness

d = 1.00

mm and index

n = 1.50

. Both faces are coated to reflectance

\mathcal{R} = 0.85

. ((a)) Compute the free spectral range

\Delta\nu_{\rm FSR}

. ((b)) Compute the finesse

\mathcal{F}