PROTECTED LIGHT SOURCE FOR MULTIPLE WAVELENGTH DIVISION MULTIPLEX PASSIVE OPTICAL NETWORK (WDM-PON)

摘要

PROBLEM TO BE SOLVED: To obtain a protected light source generating seed light for at least two wavelength division multiplex passive optical networks (WDM-PON).SOLUTION: A protected light source includes an optical coupler having N≥2 input ports, and M≥2 output ports. Each output port is connected optically so as to supply seed light to each set of WDM-PON. Each set includes one or a plurality of WDM-PON. A multiple wavelength light source (MWLS) is connected optically with each input port of the optical coupler, so as to supply seed light. A control unit controls operation of each multiple wavelength light source (MWLS).