An air-spaced Fabry-Perot etalon has two identical
PHYSICS · Multi-part · Fermi University Physics · Mathematical Methods for Physics · Optics & Photonics · Interference and diffraction
What an Instrument Can See, Ch Multiple beams: the stack as a matrix and the etalon as a filter
Problem
An air-spaced Fabry-Perot etalon has two identical, lossless, plane mirrors of power reflectance R=0.950 separated by an air gap d=25.0 mm (n=1). It is illuminated at normal incidence with λ=550 nm.
((a)) Write the etalon as the matrix product mirror × spacer × mirror and give the free spectral range in Hz.
((b)) Give the power transmission on resonance.
((c)) Give the power transmission exactly midway between two adjacent resonances.