| 摘要 |
PURPOSE:To reduce losses of a light distributor, by giving a uniform intensity distribution at its output terminal to optical signals from its input terminal after mixing them at the inside of the distributor and outputting the optical signals to plural step-index type optical fibers equipped with plural transmission lines and having a small core diameter. CONSTITUTION:When light is inputted to a spiral mixer 4 composed of a core 5 and clad 6 from an input side transmission line 1 composed of a core 2 and clad 3, the output of the mixer 4 becomes a signal having uniform intensity at its output terminal. The signal is distributed to, for example, seven parts by coupling an optical fiber bundle 13 formed by bundling most closely one ends of seven optical fibers to the output terminal of the mixer 4. The core diameter 5 of the optical mixer 4 is set to one which includes all the cores 14 of the optical fiber bundle 13. The output terminal of the optical fiber bundle 13 is connected with an output transmission line 10 by making the core 14 of the bundle 13 coincident with the axis of the core 11 of the output transmission line 10. Therefore, the optical mixer 4 is coupled with the optical fiber bundle 13 in step index form and, as a result, loss of this light distributor can be reduced sharply. |
