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Optical Engineering

Switchless hybrid analog-digital variable optical delay line for radio frequency signal processing
Author(s): Nabeel A. Riza
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Paper 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.

Paper Details

Date Published: 1 March 2009
PDF: 4 pages
Opt. Eng. 48(3) 035005 doi: 10.1117/1.3101455
Published in: Optical Engineering Volume 48, Issue 3
Show Author Affiliations
Nabeel A. Riza, CREOL, The College of Optics and Photonics, Univ. of Central Florida (United States)

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