OPTICAL COMMUNICATION SYSTEM

摘要

An optical communication system is provided to minimize the signal degradation and cross talk which are generated due to the dispersion and non-linearity of an optical fiber by phase-modulating and transmitting data of half-frequency. An optical communication system comprises the followings: an optical fiber(130) which transmits an optical signal phase-modulated in an optical transmitter(110) to a photo receiver(120); and the photo receiver which frequency-multiplies the received optical signal to detect data, and includes a time delay interferometer(121), the first optical detector(122a), the second optical detector(122b) and a differential amplifier(123). The time delay interferometer generates the first and second optical signals from the received optical signal. The first optical detector photo-electrically converts the first optical signal into the first electrical signal. The second optical detector photo-electrically converts the second optical signal into the second electric signal. The differential amplifier differentially amplifies the first and second electrical signals received from each optical detector.