Title :
Characterization of a coherent optical RF channelizer based on a diffraction grating
Author :
Wang, Wenshen ; Davis, Richard L. ; Jung, Thomas J. ; Lodenkamper, Robert ; Lembo, Lawrence J. ; Brock, John C. ; Wu, Ming C.
Author_Institution :
New Focus Inc., Santa Clara, CA, USA
fDate :
10/1/2001 12:00:00 AM
Abstract :
A coherent optical RF channelizer has been constructed and characterized. The optical channelizer is based on a free-space optical diffraction grating, and utilizes coherent optical heterodyne detection to translate all of the frequency channels to a common intermediate frequency (IF). The designed optical channelizer has a 1-GHz channel spacing, and a nominal 5-GHz IF and can offer an instantaneous bandwidth greater than 100 GHz. The channelizing receiver has been characterized for its frequency response, crosstalk, and spur-free dynamic range, and the results are in a good agreement with the theoretical values
Keywords :
diffraction gratings; frequency response; heterodyne detection; microwave photonics; optical crosstalk; optical receivers; 100 GHz; channelizing receiver; coherent optical RF channelizer; crosstalk; free-space optical diffraction grating; frequency response; heterodyne detection; intermediate frequency band; spur-free dynamic range; Bandwidth; Channel spacing; Diffraction gratings; Optical crosstalk; Optical design; Optical detectors; Optical diffraction; Optical mixing; Optical receivers; Radio frequency;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
