An optical communication system, an equalizer of the optical communication system, a connecting device and a receiving device, and a determination device, a determination method and a program of the amount of attenuation given by the equalization device.

摘要

To provide a technique for equalizing a plurality of wavelength multiplexed optical signals transmitted by a spatially multiplexing optical fiber at low cost.SOLUTION: A determination method of a determination device that determines an attenuation amount given by an equalizer in an optical communication system that transmits N×M optical signals by spatially multiplexing N wavelength multiplexed signals in each of which optical signals from a first wavelength to an M-th wavelength are wavelength multiplexed includes: determining a first optical power, which is a minimum optical power, of optical powers of the input N×M optical signals, determining a maximum value of differences of optical power of the N optical signals for each of the first wavelength to the M-th wavelength; determining a second optical power based on the sum of the maximum value of the maximum values determined for each of the first wavelength to the M-th wavelength and the first optical power; and determining an attenuation amount of an m-th wavelength, where m is an integer from 1 to M, based on the difference between the maximum value of the optical powers of the N optical signals of the input m-th wavelength and the second optical power.SELECTED DRAWING: Figure 5