Switchless hybrid analog-digital variable optical delay line for radio frequency signal processing
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Date
2009-03-01
Authors
Riza, Nabeel A.
Journal Title
Journal ISSN
Volume Title
Publisher
Society of Photo-Optical Instrumentation Engineers (SPIE)
Published Version
Abstract
The author proposes the design of a novel switchless variable optical delay line (VFODL) for radio frequency (rf) signals that combines an analog mode VFODL with a discrete-state VFODL. This hybrid VFODL proposes the use of a laser with smart, fast (e.g., 1 ns) wavelength tuning in combination with flat-top passband design spatially and temporally dispersive optical elements to simultaneously provide both long and short time delays, thus finely covering a wide nanoseconds delay range. An example design indicates a 9.6-ns time delay range with 6-ps increments, giving 1600 independent delays using a no-moving-parts signal-processing structure. VFODL applications include rf antenna array processing, radar testing, and precision electrical timing systems.
Description
Keywords
Delay lines , rf photonics , Phased array antenna controls , Fiber optics , Wavelength division multiplexing , Single mode fibers , Analog electronics , Phased arrays , Antennas , Fiber Bragg gratings , Hybrid optics
Citation
Riza, N. A. (2009) 'Switchless hybrid analog-digital variable optical delay line for radio frequency signal processing', Optical Engineering 48(3), 035005, (4 pp). doi: 10.1117/1.3101455
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Copyright
© 2009 Society of Photo-Optical Instrumentation Engineers (SPIE). One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.