Optical wavelength multiplexing transmission device and optical wavelength multiplexing transmission method

An optical wavelength multiplexing transmission device comprising:

• a demultiplexer configured to demultiplex a wavelength multiplexing signal for each wavelength band from a multiplexed signal that includes wavelength multiplexing signals in a plurality of the wavelength bands;
• a processor configured to detect an optical power value of each wavelength multiplexing signal for each wavelength band;
• calculate a compensation amount used to compensate a tilt of the wavelength multiplexing signal, by using the optical power value and a predetermined calculation expression;
• and
• compensate the tilt of the wavelength multiplexing signal, based on the compensation amount;
• and
• a multiplexer configured to multiplex each wavelength multiplexing signal compensated by the processor and output the wavelength multiplexing signal to a transmission line,
• wherein the processor is further configured to:
• acquire transmission line characteristics that indicates an optical power value in each wavelength band for each transmission distance of the transmission line;
• calculate a generated tilt amount of the transmission line, based on the transmission line characteristics;
• calculate an estimated compensation amount used to compensate the tilt of the wavelength multiplexing signal, by using the generated tilt amount of the transmission line and the predetermined calculation expression;
• calculate a correction coefficient used to correct the predetermined calculation expression, based on the estimated compensation amount and a current compensation amount;
• and
• update the correction coefficient.