Method and System for Using Square Wave Digital Chirp Signal for Optical Chirped Range Detection

An apparatus is provided for using a square wave digital chirp signal for optical chirp range detection. A laser source emits an optical signal and a RF waveform generator generates an input digital chirp signal based on the square wave digital chirp signal. A frequency of the optical signal is modu...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: Curry, James, Funk, Richard, Berg, Trenton, Oliver, Kyle, Ferguson, Daniel, Crouch, Stephen C
Format: Patent
Sprache:eng
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Beschreibung
Zusammenfassung:An apparatus is provided for using a square wave digital chirp signal for optical chirp range detection. A laser source emits an optical signal and a RF waveform generator generates an input digital chirp signal based on the square wave digital chirp signal. A frequency of the optical signal is modulated based on the input digital chirp signal. A splitter divides the optical signal into a transmit optical signal and a reference optical signal. A detector combines the reference optical signal and a return optical signal from an object. The detector generates an electrical output signal based on the combined reference optical signal and the return optical signal. A processor determines a range to the object based on a characteristic of a Fourier transform the electrical output signal. A method is also provided for using the square wave digital chirp signal for optical chirp range detection.