OPTICAL LINK MODULE OF ONT/ONU WITH WAVELENGTH TUNING FUNCTION IN WDM-PON, OPTICAL LINK SYSTEM THEREFOR, AND METHOD FOR WAVELENGTH TUNING

摘要

A link module of an ONT/ONU with an optical wavelength aligning function in WDM-PON, a link system, and a method of aligning optical wavelength are provided to perform communication by initializing the optical wavelength of the link module automatically without intervention of a user or an installer. An initial information creation unit(111) creates link initiation information which is logical information of a predetermined format for checking a transmission state. A wavelength control unit(113) assigns output wavelengths to be outputted from a wavelength group sequentially. An optical transmission unit(115) transmits an assigned optical signal including the link initiation information to the assigned wavelength, whenever assigning the output wavelength from the wavelength control unit. A wavelength selection unit(119) stops the sequential assignment to the wavelength control unit if a response optical signal including response initiation information is received.