Method and system for clock synchronization in an optical communications network.

摘要

In an optical communication system, a plurality of apparatuses are connected by a star coupler. A signal from each of the optical communication apparatuses is received by a receiving device such as a photodiode while a signal to each of the apparatuses is transmitted by a transmitting device such as a laser diode. A reference clock is supplied to the transmitting device. A clock of the signal from an optical communication apparatus is extracted to generate a phase comparison information signal of the extracted clock and the reference clock so as to supply the phase comparison information signal to the transmitting device. In the optical communication apparatus, a clock from the signal from the transmitting device is extracted, the phase comparison information signal contained in the signal from the transmitting device is extracted, and a transmit clock of the signal to be transmitted from the optical communication apparatus is controlled and oscillated such that a phase difference represented by the phase comparison signal is minimized.