Patent ID: 6763193
Filing Date: 2004-07-13
Classification: H04B,H04J,H04N

Abstract:
An optical communication system for transmitting both baseband and passband signals on a common optical transmission path comprising:a source of an electrical baseband signal; a source of an electrical passband signal modulated for digital broadcast services, and the passband signal comprises high bit rate M-QAM modulation wherein M&gE;64; a first optical transmitter responsive to the electrical baseband signal for generating an optical baseband signal that can be optimized in light power for combination with an optical passband signal; a second optical transmitter responsive to the electrical passband signal for generating the optical passband signal that can be optimized in light power for combination with the optical baseband signal; an optical combiner optically coupled to the transmitters for combining the optical baseband and passband signals into a combined optical signal; an optical transmission path optically coupled to the combiner for transmitting the combined optical signal; and an optical receiver optically coupled to the transmission path for receiving transmitted optical signals.