Optical wavelength multiplex transmission method and optical dispersion compensation method

An apparatus, comprising:

• a plurality of light sources to output a plurality of optical signals having different wavelengths within a wavelength-division-multiplexing signal bandwidth;
• and
• a multiplexer to multiplex the plurality of optical signals into a wavelength-division-multiplexed signal and to transmit the wavelength-division-multiplexed signal to an optical fiber transmission line having a zero dispersion wavelength, wherein
• each of the plurality of optical signals are associated with one of a plurality of signal channels,
• each of the plurality of signal channels are arranged to a shorter wavelength side of the zero dispersion wavelength, and
• dispersion given to the optical signals transmitted through the signal channels is collectively compensated.

An apparatus, comprising:

• a plurality of light sources to output a plurality of optical signals having different wavelengths within a wavelength-division-multiplexing signal bandwidth;
• and
• a multiplexer to multiplex the plurality of optical signals into a wavelength-division-multiplexed signal and to transmit the wavelength-division-multiplexed signal to an optical fiber transmission line having a zero dispersion wavelength, wherein
• each of the plurality of optical signals are associated with one of a plurality of signal channels,
• the plurality of signal channels are arranged to both a longer wavelength side and a shorter wavelength side of the zero dispersion wavelength, and
• dispersion given to the optical signals transmitted through the signal channels is collectively compensated.

An apparatus, comprising:

• a transmitter to output a plurality of optical signals having different wavelengths within a wavelength-division-multiplexing signal bandwidth, wherein
• each of the plurality of optical signals are associated with one of a plurality of signal channels,
• the plurality of optical signals are input to an optical fiber transmission line having a zero dispersion wavelength,
• each of the plurality of signal channels is arranged to a longer wavelength side of the zero dispersion wavelength, and
• dispersion given to the optical signals transmitted through the signal channels is collectively compensated.

An apparatus, comprising:

• a transmitter to output a plurality of optical signals having different wavelengths within a wavelength-division-multiplexing signal bandwidth, wherein
• each of the plurality of optical signals are associated with one of a plurality of signal channels,
• the plurality of optical signals are input to an optical fiber transmission line having a zero dispersion wavelength,
• each of the plurality of signal channels is arranged to a shorter wavelength side of the zero dispersion wavelength, and
• dispersion given to the optical signals transmitted through the signal channels is collectively compensated.

An apparatus, comprising:

• a transmitter to output a plurality of optical signals having different wavelengths within a wavelength-division-multiplexing signal bandwidth, wherein
• each of the plurality of optical signals are associated with one of a plurality of signal channels,
• the plurality of optical signals are input to an optical fiber transmission line having a zero dispersion wavelength,
• the signal channels are arranged to both a longer wavelength side and a shorter wavelength side of the zero dispersion wavelength, and
• dispersion given to the optical signals transmitted through the signal channels is collectively compensated.

An apparatus, comprising:

• input ports to receive a plurality of optical signals having different wavelengths within a wavelength-division-multiplexing signal bandwidth;
• and
• a wave combiner, optically coupled to an optical fiber transmission line having a zero dispersion wavelength, to multiplex the plurality of optical signals into a wavelength-division-multiplexed signal transmitted through the optical fiber transmission line, wherein
• each of the plurality of optical signals are associated with one of a plurality of signal channels,
• each of the plurality of signal channels is arranged to a longer wavelength side of the zero dispersion wavelength, and
• dispersion given to the optical signals transmitted through the signal channels is collectively compensated.

An apparatus, comprising:

• input ports to receive a plurality of optical signals having different wavelengths within a wavelength-division-multiplexing signal bandwidth;
• and
• a wave combiner, optically coupled to an optical fiber transmission line having a zero dispersion wavelength, to multiplex the plurality of optical signals into a wavelength-division-multiplexed signal transmitted through the optical fiber transmission line, wherein
• each of the plurality of optical signals are associated with one of a plurality of signal channels,
• each of the plurality of signal channels is arranged to a shorter wavelength side of the zero dispersion wavelength, and
• dispersion given to the optical signals transmitted through the signal channels is collectively compensated.

An apparatus, comprising:

• input ports to receive a plurality of optical signals having different wavelengths within a wavelength-division-multiplexing signal bandwidth;
• and
• a wave combiner, optically coupled to an optical fiber transmission line having a zero dispersion wavelength, to multiplex the plurality of optical signals into a wavelength-division-multiplexed signal transmitted through the optical fiber transmission line, wherein
• each of the plurality of optical signals are associated with one of a plurality of signal channels,
• the signal channels are arranged to both a longer wavelength side and a shorter wavelength side of the zero dispersion wavelength, and
• dispersion given to the optical signals transmitted through the signal channels is collectively compensated.

An apparatus for receiving a wavelength-division-multiplexed optical signal from an optical transmission line having a zero dispersion wavelength, comprising:

• a demultiplexer to demultiplex the wavelength-division-multiplexed optical signal into a plurality of optical signals having different wavelengths within a wavelength-division-multiplexing signal bandwidth;
• and
• a plurality of receiving devices, each for receiving one of the plurality of optical signals, wherein
• each of the plurality of optical signals are associated with one of a plurality of signal channels,
• each of the plurality of signal channels are arranged to a longer wavelength side of the zero dispersion wavelength, and
• dispersion given to the optical signals transmitted through the signal channels is collectively compensated.

An apparatus for receiving a wavelength-division-multiplexed optical signal from an optical transmission line having a zero dispersion wavelength, comprising:

• a demultiplexer to demultiplex the wavelength-division-multiplexed optical signal into a plurality of optical signals having different wavelengths within a wavelength-division-multiplexing signal bandwidth;
• and
• a plurality of receiving devices, each for receiving one of the plurality of optical signals, wherein
• each of the plurality of optical signals are associated with one of a plurality of signal channels,
• each of the plurality of signal channels are arranged to a shorter wavelength side of the zero dispersion wavelength, and
• dispersion given to the optical signals transmitted through the signal channels is collectively compensated.

An apparatus for receiving a wavelength-division-multiplexed optical signal from an optical transmission line having a zero dispersion wavelength, comprising:

• a demultiplexer to demultiplex the wavelength-division-multiplexed optical signal into a plurality of optical signals having different wavelengths within a wavelength-division-multiplexing signal bandwidth;
• and
• a plurality of receiving devices, each for receiving one of the plurality of optical signals wherein
• each of the plurality of optical signals are associated with one of a plurality of signal channels,
• the signal channels are arranged to both a longer wavelength side and a shorter wavelength side of the zero dispersion wavelength, and
• dispersion given to the optical signals transmitted through the signal channels is collectively compensated.

An apparatus for receiving a wavelength-division-multiplexed optical signal from an optical fiber transmission line having a zero dispersion wavelength, comprising:

• an optical demultiplexer to demultiplex the wavelength-division-multiplexed optical signal into a plurality of optical signals having different wavelengths within a wavelength-division-multiplexed signal bandwidth, wherein
• each of the plurality of optical signals are associated with one of a plurality of signal channels,
• each of the plurality of signal channels is arranged to a longer wavelength side of the zero dispersion wavelength, and
• dispersion given to the optical signals transmitted through the signal channels is collectively compensated.

An apparatus for receiving a wavelength-division-multiplexed optical signal from an optical fiber transmission line having a zero dispersion wavelength, comprising:

• an optical demultiplexer to demultiplex the wavelength-division-multiplexed optical signal into a plurality of optical signals having different wavelengths within a wavelength-division-multiplexed signal bandwidth, wherein
• each of the plurality of optical signals are associated with one of a plurality of signal channels,
• each of the plurality of signal channels is arranged to a shorter wavelength side of the zero dispersion wavelength, and
• dispersion given to the optical signals transmitted through the signal channels is collectively compensated.

An apparatus for receiving a wavelength-division-multiplexed optical signal from an optical fiber transmission line having a zero dispersion wavelength, comprising:

• an optical demultiplexer to demultiplex the wavelength-division-multiplexed optical signal into a plurality of optical signals having different wavelengths within a wavelength-division-multiplexed signal bandwidth, wherein
• each of the plurality of optical signals are associated with one of a plurality of signal channels,
• the signal channels are arranged to both a longer wavelength side and a shorter wavelength side of the zero dispersion wavelength, and
• dispersion given to the optical signals transmitted through the signal channels is collectively compensated.