PASSIVE OPTICAL NETWORK SYSTEM HAVING A WAVELENGTH DIVISION MULTIPLEXING METHOD, CONCERNED WITH IMPROVING AMPLIFICATION OF AN OUTPUT LIGHT AND WAVELENGTH SELECTION PROPERTIES

摘要

PURPOSE: A PON(Passive Optical Network) system having a WDM(Wavelength Division Multiplexing) method is provided to configure a reflective optical fiber grating and a semiconductor optical amplifier to have a resonator function, thereby improving amplification of an output light and wavelength selection properties. CONSTITUTION: A CO(Central Office)(200) comprises as follows. An optical strength divider(220) has the first port disposed on one end connected to an optical fiber(230) and the second plural ports disposed on the other end, divides power of an upward optical signal to output the signal, and outputs a downward optical signal to the first port. Plural optical transceiver modules(210) receive the upward optical signal, and output the downward optical signal to the second ports. Each of the optical transceiver modules(210) comprises as follows. An optical transceiver(211) has a reflective optical fiber grating, and outputs a light resonating between a semiconductor amplifier and the reflective optical fiber grating. An optical receiver(215) has a transmissible optical fiber grating, and an optical detector.