| 摘要 |
PURPOSE:To obtain new optical parts suitable for optical wavelength multiplex transmission of a broadcasting type by providing a parallel moving mechanism to an output optical fiber or input optical fiber. CONSTITUTION:Light consisting of different wavelength is subjected to wavelength dispersion and is reflected at the angles varying with each wavelength when 5 different signals form the input optical fiber 3 are entrained in the light consisting of the 5 different wavelengths and are projected diagonally to a plane linear diffraction grating via a lens 2. This light is condensed by the lens 2 and only the light of one wavelength N in the light of the respectively different wavelengths focuses on the end face of the output optical fiber 4. The light of the other wavelengths is received by moving the output optical fiber in parallel by the use of the parallel moving mechanism 5 to project the light of the required wavelength to the output optical fiber and converting the light to an electric signal by a photoelectric transducer 6. Only the light of the required wavelength from the plural wavelengths is thereby received in a piece of the output optical fiber and the new small-sized and high- performance parts for optical wavelength multiplex transmission are obtd. |
