Concurrent AM and FM over optical communication
OwnerJoseph Daniel Vanceinventor
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Abstract
A communication system is disclosed where information is embedded in the frequency of an optical electromagnetic radiation carrier, and concurrently, information is embedded in the amplitude of the optical electromagnetic radiation carrier. The electromagnetic radiation carrier is then propagated and collected by a receiver. The receiver is composed of a demodulator that can determine frequency of the electromagnetic carrier independently of carrier amplitude. The demodulator then extracts information from the electromagnetic carrier frequency and amplitude. The demodulator utilizes dispersion adjacent to absorption in paramagnetic vapors to determine frequency, and can also measure signal amplitude.
Claims3
A communication system comprised of:
- (a) a seed laser;
- (b) a laser amplifier;
- (c) a demodulator;
- wherein an FM information is modulated into the frequency of electromagnetic radiation carrier wave produced and emitted from the seed laser;
- wherein AM information is modulated into the amplitude of electromagnetic radiation carrier wave by the laser amplifier;
- wherein the electromagnetic radiation carrier wave is propagated to the demodulator;
- wherein FM information and AM information are both extracted from the electromagnetic radiation carrier wave by the demodulator.
Dependencies are inferred from the claim text.