Long-distance box and method for processing uplink and downlink light thereof

Abstract

The disclosure provides a long-distance box and a method for processing uplink light and downlink light of the long-distance box, uplink light and downlink light from different Passive Optical Network (PON) systems are split, the uplink light from the different PON systems is transmitted through a first optical path, and the downlink light from the different PON systems is transmitted through a second optical path; wherein the uplink light from the different PON systems is amplified by an Optical Amplifier (OA) and then output to Optical Line Terminals (OLT) of respective systems; the downlink light from different PON systems with the different wavelengths is transmitted through different optical sub-paths of the second optical path according to the wavelengths of the downlink light, and the downlink light is amplified by different Optical-Electrical-Optical (OEO) conversion devices on the different optical sub-paths and then output to Optical Network Units (ONUs) of the respective systems. The disclosure applies a hybrid long-distance box combining OEO and OA technologies to process a point-to-multipoint fiber access of a coexisting PON system, integrates advantages of both OA and OEO, and has high reliability, such that both uplink light and downlink light from different PON systems are amplified effectively.