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Fiber Optics and Optical Communication

Switchless hybrid analog-digital variable optical delay line for radio frequency signal processing

[+] Author Affiliations
Nabeel A. Riza

University of Central Florida,CREOL, The College of Optics and Photonics, Photonic Information Processing Systems, Laboratory 4000 Central Florida Blvd., Orlando, Florida 32816-2700

Opt. Eng. 48(3), 035005 (March 23, 2009). doi:10.1117/1.3101455
History: Received January 09, 2009; Accepted February 06, 2009; Published March 23, 2009
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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., 1ns) 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.

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© 2009 Society of Photo-Optical Instrumentation Engineers

Citation

Nabeel A. Riza
"Switchless hybrid analog-digital variable optical delay line for radio frequency signal processing", Opt. Eng. 48(3), 035005 (March 23, 2009). ; http://dx.doi.org/10.1117/1.3101455


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