| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical code division multiplex network system equipped with a function for controlling operation wavelengths of an encoder and a corresponding decoder to be matched with each other at always.SOLUTION: Optical code modulation parts are corresponded to N pieces of subscriber nodes (12-1 to 12-N) in one-to-one manner, to be provided as optical code modulation parts 24-1 to 24-N. A reception part 30 includes a splitter 32 and an optical decoding receiving part. Optical decoding receiving parts 34-1 to 34-N are provided to be corresponded to N pieces of subscriber nodes (12-1 to 12-N) in one-to-one manner. Wavelength control part 40 causes a local node input signal 39 that has been inputted to be subjected to a wavelength spectral resolution, for measuring each wavelength spectrum of feedback residue first optical multiplex signal and second optical multiplex signal. The operation wavelengths of an encoder 18 and a decoder 46 are adjusted so that each spectrum approaches a similar shape or congruent shape of a first reference wavelength spectrum and a second reference wavelength spectrum. |
