Dynamic bandpass filtering using a programmable Interferometer array

• Published in: IEEE photonics technology letters Vol. 17; no. 5; pp. 1079 - 1081
• Main Authors: Afonso, A., de la Tocnaye, J.Ld.B., Wolffer, N., Defosse, Y., Gautier, P.
• Format: Journal Article
• Language: English
• Published: New York IEEE 01-05-2005; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Arrays; Band pass filters; Channels; Demultiplexing; Dynamical systems; Dynamics; Fiber-optics components; Filter bank; Filtering; interferometer; Interferometers; Nanostructure; Optical arrays; Optical attenuators; Optical filters; Optical imaging; Optical interferometry; Optical modulation; Phased arrays; spatial light modulator (SLM)
• ISSN: 1041-1135; 1941-0174
• DOI: 10.1109/LPT.2005.844331

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.