OPTICAL COMMUNICATION SYSTEM, OPTICAL TRANSMITTER, AND OPTICAL RECEIVER

摘要

PROBLEM TO BE SOLVED: To provide an optical communication system that makes multiplexing by Internet Protocol (IP) or wavelength or multiplexing to an existing IP network easy without being constrained by linearity of optical components.SOLUTION: An optical communication system in high-frequency transmission or radio transmission according to the invention is characterized by comprising: a high-frequency modulator which modulates transmission object data and generates an analog high-frequency signal; an A/D converter which converts the analog high-frequency signal into a first digital electric signal; an encoder which converts the first digital electric signal into a desired signal format; an E/O converter which converts the signal format into a digital optical signal; an O/E converter which converts the digital optical signal into a second digital electric signal; and a D/A converter (modem/codec) which converts the second digital electric signal into an analog electric signal.