WAVELENGTH TRACKING SYSTEM USING SELF-INJECTION LOCKING, WDM-PON SYSTEM COMPRISING IT AND WAVELENGTH TRACKING METHOD

摘要

A wavelength tracking system using self-injection locking, a WDM(Wavelength Division Multiplexing)-PON(Passive Optical Network) system including the tracking system, and a wavelength tracking method are provided to adopt a new wavelength tracking structure, thereby tracking temperature and wavelength changes of a remote node without changing an existing PON structure, and minimizing wavelength unbalance between a central office and the remote node. A wavelength tracking light source(10) is located on a multiplexer output side of a central office, and master-oscillates to a wavelength which an injected light has. A reflector(30) is connected with or integratedly formed on a demultiplexer of a remote node, and reflects light of a particular wavelength among optical signals incoming from the wavelength tracking light source. A monitoring unit(40) monitors a wavelength of an optical signal master-oscillated in the light source by injection of the light relected from the reflector.