Patent ID: 8879908
Filing Date: 2014-11-04
Classification: H04B,H04J

Abstract:
1. An optical channel monitor comprising: a demultiplexer configured to demultiplex an input optical signal, which is wavelength-multiplexed, for respective multiplexed wavelengths to generate a plurality of optical signals; a plurality of paths which respectively generate a plurality of digital signals indicating optical powers of said plurality of optical signals; and a processing section which inputs said plurality of digital signals to calculate correction values of said optical powers, which correspond to characteristics of said demultiplexer, wherein said demultiplexer includes a filter having FWHM (Full Width at Half Maximum) within a predetermined range, wherein said predetermined range is set based on a pass center wavelength accuracy of said filter and an oscillation wavelength accuracy of a transponder which generates said input optical signal, wherein said filter includes a Gaussian filter represented by a Gaussian distribution, wherein said pass center wavelength accuracy is denoted as Δλ (fil), wherein said oscillation wavelength accuracy is denoted as Δλ (sig), and wherein said FWHM satisfies a following inequality: