OPTICAL TRANSMISSION DEVICE

摘要

PROBLEM TO BE SOLVED: To provide an optical transmission device capable of reducing optical transmission loss of an optical signal and light receiving noise in optical wavelength multiplex transmission. SOLUTION: The optical transmission device is provided with an optical fiber 15 transmitting an optical multiplex signal where a plurality of light beams which are different in wavelengths are multiplexed, optical waveguides 14A to 14D branching the optical multiplex signal transmitted by the optical fiber 15 into a plurality of optical multiplex signals, optical band pass filters 16A to 16D which are arranged on the optical axes of a plurality of the optical multiplex signals branched by the optical waveguides 14A to 14D and select the optical signals of the specified wavelengths and light-receiving elements 12A to 12D for receiving the optical signals selected by the optical bandpass filters 16A to 16D.