Using a radio frequency coherent modulation and demodulation technique, we explicitly measure both the amplitude and the phase response of Fabry–Perot interferometers in reflection. This allows us to differentiate clearly between overcoupled and undercoupled cavities and allows a detailed measurement of the full width at half-maximum, the free spectral range, and the finesse of the cavities.
© 2000 Optical Society of America
Bram J. J. Slagmolen, Malcolm B. Gray, Karl G. Baigent, and David E. McClelland, "Phase-Sensitive Reflection Technique for Characterization of a Fabry-Perot Interferometer," Appl. Opt. 39, 3638-3643 (2000)