| 摘要 |
PURPOSE:To facilitate the handling of a transmission line and to simplify the connection by providing an electrooptic converting means converting each of a branched electric signal into a visual signal light and constituting an optical fiber with a plastic optical fiber. CONSTITUTION:An electric signal 8 drives a 0.67mum use semiconductor laser device 21 irradiating a visual light and the visual signal light 22 being the output is inputted to a plastic optical fiber 23 having, e.g., 1mm diameter of the core. Thus, the adjustment and connection of the optical system are executed while observing them visually and since the diameter of the core of the plastic optical fiber is considerably larger, the tolerance required for alignment adjustment or connection is relaxed by one digit or over. A light emitting diode is used in place of the semiconductor laser as the electrooptic conversion element. Further, the photodetector for a signal light irradiated from a main system transmission line can be a photo diode. |
