Title :
Dynamic bandpass filtering using a programmable Interferometer array
Author :
Afonso, A. ; de la Tocnaye, J.Ld.B. ; Wolffer, N. ; Defosse, Y. ; Gautier, P.
Author_Institution :
Groupement des Ecoles de Telecommun.-Ecole Nat. Superieure de Telecommun. de Bretagne, Brest, France
fDate :
5/1/2005 12:00:00 AM
Abstract :
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.
Keywords :
Michelson interferometers; band-pass filters; demultiplexing; nanostructured materials; optical arrays; optical filters; phase modulation; polymer dispersed liquid crystals; spatial light modulators; 4-f free space imaging; Michelson interferometer; channel optical paths; demultiplexing; dynamic bandpass filtering; programmable interferometer array; reconfigurable nano-polymer dispersed liquid crystal phase modulator array; Band pass filters; Filter bank; Filtering; Optical arrays; Optical attenuators; Optical filters; Optical imaging; Optical interferometry; Optical modulation; Phased arrays; Fiber-optics components; interferometer; spatial light modulator (SLM);
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2005.844331
