Patent ID: 8213798
Filing Date: 2012-07-03
Classification: H04B,H04J

Abstract:
1. An optical transmission apparatus transmitting a wavelength division multiplexed optical signal of an intensity modulation optical signal and a phase modulation optical signal through an optical transmission line, comprising: an intensity inversion signal light output unit that outputs light having an intensity pattern obtained by inverting intensity changes of the intensity modulation optical signal near a wavelength of the intensity modulation optical signal in arrangement on wavelength axis of optical wavelengths that can be multiplexed as the wavelength division multiplexed optical signal; and a wavelength division multiplexed optical signal output unit that wavelength-division-multiplexes the intensity modulation optical signal, the phase modulation optical signal and light from the intensity inversion signal light output unit and outputs a wavelength-division-multiplexed optical signal that the intensity modulation optical signal, the phase modulation optical signal and the light from the intensity inversion signal light output unit are wavelength-division-multiplexed.