Abstract:

While continuously providing a service in an existing optical communication system, a service at another communication speed is realized at low cost. For this reason, a station-side optical network terminal apparatus is configured so that to one light-emitting unit connected are a first processing unit that performs a process to output an optical signal at one communication speed by the light-emitting unit and a second processing unit that performs a process to output an optical signal at another communication speed by the light-emitting unit.

Description:

This application is based upon and claims the benefit of priority from Japanese patent application No. 2006-231306, filed on Aug. 28, 2006, the disclosure of which is incorporated herein in its entirety by reference.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention pertains to a station-side optical network terminal apparatus, a subscriber-side optical network terminal apparatus, and an optical communication system such as a PON (Passive Optical Network) to perform transmission/reception of information at a high speed by communication using light as a transmission medium.

2. Description of Related Art

In recent years, with popularization of multimedia service such as video service or internet access, installation of an optical communication system which performs communication connection to a subscriber device by FTTB (Fiber to the Building), FTTH (Fiber to the Home), or the like using light as a transmission medium is advanced.

FIG. 1 shows a configuration of a general PON. In an optical communication system serving as a related art of the present invention as shown in FIG. 1, an optical signal from a station-side optical network apparatus OLT (Optical Line Terminal) is passively split and coupled by an optical star coupler serving as a 1-to-multi connection optical split coupler and connecte ...

Plasma display panel and method for manufacture of the same