Wavelength division multiplexing-passive optical network system

摘要

The present invention proposes a wavelength division multiplexing-passive optical network (WDM-PON) system which transmits downstream data to an optical network unit (ONU) as an optical line termination (OLT) receives seed light from a spectrum-sliced external light source module. One characteristic of the proposed WDM-PON system is that optical transmitters of the OLT and ONU are operated regardless of optical wavelength. Another characteristic of the proposed WDM-PON system is that a conventional TDMA-PON (E-PON or G-PON) ONU can be accommodated without a change.

主权项

1. A wavelength division multiplexing-passive optical network system, comprising:
an optical line termination located at a central office, and for transmitting an optical signal to a subscriber side and receiving an optical signal from the subscriber side; a seed light module located at the central office, and for supplying a spectrum-sliced seed light including a plurality of wavelengths to corresponding optical transmitters of the optical line termination; and an optical network unit located at the subscriber side, and for receiving an optical signal from the optical line termination, converting the same into an electric signal to obtain downstream information and transmitting an optical signal containing upstream data to the optical line termination, the optical network unit including
an optical receiver for receiving a first portion of the optical signal and restoring the downstream information, andan optical transmitter for receiving a second portion of the optical signal, changing the received portion into a pseudo continuous wave light by removing the downstream information, and modulating the pseudo continuous wave light into the upstream data.