Title :
A microwave channelizer and spectroscope based on an integrated optical Bragg-grating Fabry-Perot and integrated hybrid Fresnel lens system
Author :
Winnall, Steve T. ; Lindsay, A.C. ; Austin, Michael W. ; Canning, John ; Mitchell, Arnan
Author_Institution :
Cochlear Ltd., Lane Cover, Australia
Abstract :
A compact means to separate microwave and millimeter-wave optical signals by RF frequency in real time is demonstrated. The approach is to employ an integrated optical Bragg grating Fabry-Perot (BGFP) device to spatially separate optically modulated microwave signals with high resolution. The compactness is achieved through the use of an integrated optical hybrid diffractive lens beam expander to provide the required optical wavefront to the BGFP. A proof-of-principle measurement was performed from 1 to 23 GHz with peak finesse of 27. The theoretical analysis, fabrication procedure, experimental results, limitations, and improvements are described.
Keywords :
Bragg gratings; Fresnel diffraction; integrated optics; interference spectrometers; lenses; microwave photonics; microwave spectrometers; optical information processing; 1 to 23 GHz; Fabry-Perot interferometer; Fresnel lens system; diffractive lens beam expander; microwave channelizer; microwave optical signals; microwave spectroscope; millimeter-wave optical signals; optical Bragg-gratings; optical wavefront; Bragg gratings; Fabry-Perot; Integrated optics; Lenses; Microwave devices; Optical devices; Optical modulation; RF signals; Radio frequency; Spectroscopy; Fabry–Perot interferometers; microwave receivers; optical planar waveguide components; optical signal processing;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
DOI :
10.1109/TMTT.2005.863052
