Patent ID: 9093816
Filing Date: 2015-07-28
Classification: H01S,H04B

Abstract:
1. An optical transmission apparatus comprising: an optical amplifier configured to amplify a wavelength-division multiplexed signal light using an amplifying medium doped with a rare earth ion; at least one first optical transmitter configured to output a dual-polarization-multiplexed-QPSK (“DP-QPSK”) signal which is generated by multiplexing two QPSK signals each having different polarization and the same wavelength, the DP-QPSK signal having a wavelength included in of a polarization hole burning band of the optical amplifier; a second optical transmitter configured to output a wavelength of a non polarization signal to a long wavelength side of the amplification band of the optical amplifier other than the polarization hole burning band; and an optical multiplexer configured to input the DP-QPSK signal and the non polarization signal and output a wavelength-division multiplexed signal to the optical amplifier, the wavelength-division multiplexed signal comprising the non polarization signal and the DP-QPSK signal.