WAVELENGTH CONVERSION APPARATUS IN TDM-PON SYSTEM BASED ON WDM SYSTEM AND OPTICAL TRANSMISSION APPARATUS AND METHOD USING THE SAME

摘要

A wavelength conversion apparatus in a TDM-PON system based on WDM(Wavelength Division Multiplexing) and an optical transmission apparatus and method using the same are provided to enable each subscriber group to have each instinct wavelength and transmit data to an OLT using an optical fiber, thereby improving the bandwidth efficiency of each subscriber and saving a transmission cost. An OLT(Optical Line Terminal) is positioned at a CO(Central Office). The OLT has an instinct wavelength and transceives data to each subscriber group. The OLT transmits data to plural subscribers using a transmitting terminal. ONUs(Optical Network Units) transmit the uplink data using the wavelength of 1310nm bandwidth used in an existing TDM-PON(Time Division Multiplexing-Passive Optical Network). An RN(Remote Node) routes ONU uplink signals to a wavelength conversion apparatus pre-assigned by subscriber group, converts the ONU uplink signals into signals in wavelength assigned in the wavelength conversion apparatus, and transmits the converted signals to the OLT.