OPTICAL TRANSMITTER, OPTICAL RECEIVER, OPTICAL TRANSMISSION METHOD AND OPTICAL RECEPTION METHOD
An optical transmitter includes a multiplexed signal generation unit that multiplexes a plurality of narrowband signals and generates a broadband optical modulated signal; and a semiconductor optical amplifier that amplifies intensity of the broadband optical modulated signal.
1 . An optical transmitter comprising:
a multiplexed signal generation unit that multiplexes a plurality of narrowband signals and generates a broadband optical modulated signal; and
a semiconductor optical amplifier that amplifies an intensity of the broadband optical modulated signal.
2 . The optical transmitter according to claim 1 , wherein the multiplexed signal generation unit includes:
a broadband signal generation unit that generates a broadband signal having a wider frequency band than the narrowband signal from the plurality of narrowband signals; and
an optical modulation unit that modulates an optical signal based on the broadband signal and generates the broadband optical modulated signal.
3 . The optical transmitter according to claim 1 , wherein the multiplexed signal generation unit includes:
a plurality of optical modulation units that modulates an optical signal based on the narrowband signal and generates an optical modulated signal; and
a wavelength multiplexing unit that multiplexes the plurality of optical modulated signals to generate the broadband optical modulated signal.
4 . The optical transmitter according to claim 1 further comprising
a distortion compensation unit that compensates for distortion of the broadband optical modulated signal due to the semiconductor optical amplifier.
5 . An optical receiver comprising:
a semiconductor optical amplifier that amplifies an intensity of a broadband optical modulated signal; and
a multiplexed signal separation unit that separates the broadband optical modulated signal into a narrowband signal.
6 . The optical receiver according to claim 5 , wherein the multiplexed signal separation unit includes:
a photoelectric conversion unit that converts the amplified broadband optical modulated signal into an electric signal; and
a broadband signal-to-narrowband signal conversion unit that separates the electrical signal based on a band.
7 . The optical receiver according to claim 5 , wherein the multiplexed signal separation unit includes:
a wavelength demultiplexing unit that demultiplexes the amplified broadband optical modulated signal and generates a narrowband optical modulated signal; and
a photoelectric conversion unit that converts the narrowband optical modulated signal into a narrowband signal.
8 . The optical receiver according to claim 6 further comprising
an SOA distortion compensation unit that compensates for distortion of the broadband optical modulated signal due to the semiconductor optical amplifier.
9 . An optical transmission method comprising:
a multiplexed signal generation step of multiplexing a plurality of narrowband signals and generating a broadband optical modulated signal; and
a semiconductor optical amplification step of amplifying an intensity of the broadband optical modulated signal.
10 . (canceled)