Dynamic bandpass filtering using a programmable Interferometer array

We describe the principle and present preliminary results obtained on a dynamic bandpass filter using a 4-f free space imaging system with demultiplexing optics in one arm of a Michelson interferometer. Attenuation and blocking are performed by delaying the channel optical paths thanks to a reconfigurable nano-polymer dispersed liquid crystal phase modulator array. Our system is intrinsically polarization insensitive.