1 March 2009 Switchless hybrid analog-digital variable optical delay line for radio frequency signal processing
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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.
© (2009) Society of Photo-Optical Instrumentation Engineers (SPIE)
Nabeel A. Riza, Nabeel A. Riza, } "Switchless hybrid analog-digital variable optical delay line for radio frequency signal processing," Optical Engineering 48(3), 035005 (1 March 2009). https://doi.org/10.1117/1.3101455 . Submission:
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