This paper reports a demonstration of channelizing rf signals with optical techniques. RF signals are upconverted to optical frequencies and demultiplexed with an etalon. The etalon is used as a filter transmitting modulated light at discrete incidence angles. The band 100-1000 MHz is channelized into 70 MHz wide channels.
E M Alexander,
R W Gammon,
"The Fabry-Perot Etalon As An Rf Frequency Channelizer", Proc. SPIE 0464, Solid-State Optical Control Devices, (23 May 1984); doi: 10.1117/12.966225; https://doi.org/10.1117/12.966225