# Coefficient of Finesse of a Fabry-Perot Interferometer Calculator

The Coefficient of finesse (F) is from a Fabry-Pérot Interferometer, which is made of a transparent plate with two reflecting surfaces, or two parallel highly reflecting mirrors. A Fabry–Perot interferometer with high Q is said to have high finesse. Use the below online coefficient of finesse of a Fabry–Perot interferometer calculator to calculate the result of Finesse coefficient.

The finesse coefficient of a Fabry-Perot Interferometer will depend on the polarization state of the beam, since the value of "R", given by the Fresnel equations, is generally different for p and s polarizations. Enter the interface power reflectance in this coefficient of finesse of a Fabry–Perot interferometer calculator to find the resultant value.