To provide an optical fiber wavelength multiplexing transmission system capable of eliminating the need for individual wavelength control and easily realizing a highly accurate frequency control for a local oscillation light in coherent detection (homodyne or heterodyne detection).
The optical fiber wavelength multiplexing transmission system is configured such that a first transmission apparatus generates a plurality of lights for uplink signals and a locking light, shifts the wavelength of the locking light toward one side by Δλ, and a second transmission apparatus applies heterodyne detection to the locking light transmitted from the first transmission apparatus by using the local oscillation light, generates a plurality of lights including the local oscillation light, totally changes the wavelengths of a plurality of the lights including the local oscillation light while keeping a frequency interval constant and controls the local oscillation light so that the heterodyne detection detects the Δf corresponding to the Δλ in the heterodyne detection.
MORIOKA TOSHIO
Takumi Iritono
Yasushi Motoyama
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