Patent ID: 7260326
Filing Date: 2007-08-21
Classification: H04J

Abstract:
1. A wavelength-division multiplexing (WDM) device comprising: a multiplexing part having a plurality of input terminals that are capable of receiving fixed wavelengths, respectively, and an output terminal, said fixed wavelengths being multiplexed onto a multiplexed signal and output via said output terminal; a wavelength-converting unit having a plurality of wavelength-converting parts each connected to an optical transmission device so as to convert an input wavelength from said optical transmission device into a converted wavelength corresponding to said fixed wavelength; a wavelength interface unit having a plurality of interface parts each connected between an input terminal of said multiplexing part and a wavelength-converting part, each said interface part having a specific wavelength that matches the fixed wavelength of said input terminal of said multiplexing part; a filter within each said interface part that allows said specific wavelength to pass through an encoder/modulator that encodes and modulates the filtered signal into a pattern specific to said interface part; and a detection unit that detects said specific wavelength of said interface part by sequentially altering the converted wavelength, analyzing wavelengths of the multiplexed signal to detect said encoded and modulated signal wherefrom said pattern specific to said interface part is obtained and identifying said interface part and its specific wavelength.