| 摘要 |
PURPOSE:To reduce the leakage of light in same wavelength, by arranging plural optical fibers linearly so that a fiber for transmission and a fiber for reception which have the same wavelength do not adjoin to each other. CONSTITUTION:When a fiber bundle is used for the composite parts of demultiplexer and an optical switch, a long-wavelength transmission filter 18 is adhered so that the optical center to the filter 18 coincides with the center 21 of fibers 9 and 11, and the mirror 19 is adhered so that the optical center to the mirror 19 coincides with the center 22 of fibers 8 and 14. In the optical composit parts which use the fiber bundle of said structure, an input and an output fiber having the same wavelength are distance from each other by one fiber like 11 and 10 for wavelength lambda1, so the leakage of light in same wavelength is reduced. |
