Spatial Spectral Photonic Receiver for Direction Finding via Wideband Phase Sensitive Spectral Mapping
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United States of America Patent
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Issued Date -
Jun 7, 2012
app pub date -
Jun 14, 2011
filing date -
Jun 14, 2010
priority date (Note) -
Abandoned
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Abstract
An apparatus includes a single or dual output port, dual-drive Mach-Zehnder Interferometer configured to generate a first optical signal in one path, and to generate a second optical signal in a different path. The apparatus also includes an optical spectrum analyzer configured to receive output from at least one port of the dual-drive Mach-Zehnder Interferometer. A method includes causing radio frequency signals from two different antennae to modulate an optical carrier at a corresponding drive of a dual-drive Mach-Zehnder Interferometer, and causing output from at least one port of the Mach-Zehnder Interferometer to be directed to an optical spectrum analyzer. The method further comprises determining arrival angle at each of a plurality of frequencies in the radio frequency signals based on output from the optical spectrum analyzer.
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