Wavelength multiplexing optical transmission system and wavelength multiplexing optical transmitter

A wavelength multiplexing optical transmission system, comprising:

• a light source unit configured to generate a plurality of optical signals having different frequencies;
• and
• a wavelength multiplexing optical signal generating unit configured to receive the plurality of optical signals as input, and generate a wavelength multiplexing optical signal based on the plurality of optical signals to output the wavelength multiplexing optical signal,
• wherein the plurality of optical signals are arranged on optical frequency grids having a frequency spacing of Δf,
• wherein the wavelength multiplexing optical signal includes at least one specific arrangement signal group,
• wherein the at least one specific arrangement signal group includes one or more Q optical signals having a first single-polarization state and one or more R optical signals having a second single-polarization state which is orthogonal to the first single-polarization state,
• wherein the plurality of optical signals are arranged in the optical frequency grids,
• wherein, at least one guard grid on which an optical signal having the first single-polarization state and an optical signal having the second single-polarization state are prevented from being arranged is provided, and
• wherein the one or more Q optical signals having the first single-polarization state and the one or more R optical signals having the second single-polarization state, which are included in the at least one specific arrangement signal group, are arranged on the optical frequency grids in accordance with a pattern of any of SPGSS, PSGSP, PSSGP, SSGPS, SGPSP, PPSGS, or SGSPP in order of increasing optical frequency, where S represents the optical signal having the first single-polarization state, P represents the optical signal having the second single-polarization state, and G represents the at least one guard grid.

A wavelength multiplexing optical transmission system, comprising:

• a light source unit configured to generate a plurality of optical signals having different frequencies;
• and
• a wavelength multiplexing optical signal generating unit configured to receive the plurality of optical signals as input, and generate a wavelength multiplexing optical signal based on the plurality of optical signals to output the wavelength multiplexing optical signal, w
• herein the plurality of optical signals are arranged on optical frequency grids having a frequency spacing of Δf,
• wherein the wavelength multiplexing optical signal includes at least one specific arrangement signal group,
• wherein the at least one specific arrangement signal group includes one or more Q optical signals having a first single-polarization state and one or more R optical signals having a second single-polarization state which is orthogonal to the first single-polarization state,
• wherein at least one guard grid on which an optical signal having the first single-polarization state and an optical signal having the second single-polarization state are prevented from being arranged is provided, and
• wherein the plurality of optical signals are arranged on the optical frequency grids in accordance with a pattern obtained by cutting out one of a whole or a part of a successive pattern in which one pattern obtained by cyclically changing SPPSG in order of increasing optical frequency is successively repeated a plurality of times, where S represents the optical signal having the first single-polarization state, P represents the optical signal having the second single-polarization state, and G represents the at least one guard grid.

A wavelength multiplexing optical transmitter, comprising:

• a light source unit configured to generate a plurality of optical signals having different frequencies;
• and
• a wavelength multiplexing optical signal generating unit configured to receive the plurality of optical signals as input, and generate a wavelength multiplexing optical signal from the plurality of optical signals to output the wavelength multiplexing optical signal,
• wherein the plurality of optical signals are arranged on optical frequency grids having a frequency spacing of Δf,
• wherein the wavelength multiplexing optical signal includes at least one specific arrangement signal group,
• wherein the at least one specific arrangement signal group includes one or more Q optical signals having a first single-polarization state and one or more R optical signals having a second single-polarization state which is orthogonal to the first single-polarization state,
• wherein Q+R=4 is satisfied, and
• wherein the one or more Q optical signals having the first single-polarization state and the one or more R optical signals having the second single-polarization state, which are included in the at least one specific arrangement signal group, are arranged on the optical frequency grids in accordance with a pattern of one of SPSS or SSPS in order of increasing optical frequency, where S represents an optical signal having the first single-polarization state and P represents an optical signal having the second single-polarization state.