| 摘要 |
PURPOSE:To connect easily a connector by placing an input terminal in one stage of an interference filter means, so that the demultiplexed light can be outputted from plural output terminals which have been arranged and placed horizontally on the other side. CONSTITUTION:As for the light having plural wavelengths lambdaa-lambdad, which has been made incident on an optical fiber 16, the wavelengths lambdaa and lambdad pass through by a long wavelength pass filter 24, and other wavelengths lambdab and lambdac are reflected. As for the wavelengths lambdaa, lambdad which have passed through the filter 24, only lambdad is reflected by a band-pass filter 26A, and the wavelength lambdaa is obtained from an optical fiber 18a. The wavelength lambdad is reflected by a reflecting filter 28B and obtained from an optical fiber 18d. On the other hand, the wavelengths lambdab and lambdac which have been reflected by the filter 24 are reflected by a reflecting filter 28A and only the wavelength lambdab is reflected by a band-pass filter 26B, the wavelength lambdac is obtained from an optical fiber 18c, and the wavelength lambdab is reflected by a reflecting filter 28C, and thereafter, obtained from an optical fiber 18b. |
