| 摘要 |
PROBLEM TO BE SOLVED: To construct a system with extensibility and strong against environmental change by providing a reflection surface for reflecting signal light made incident from one end face and propagated to the other end face side to the one end face side. SOLUTION: An optical data bus 11 is provided with a structure for which an optical transmission layer 12 and clad layers formed so as to hold the optical transmission layer 12 from up and down are laminated over many layers. In the signal light input/output part 15 of the optical data bus 11, a light emitting element 13 and a light receiving element 15 optically coupled with the optical data bus 11 are arranged. The signal light emitted from the light emitting element 13 is made incident to the optical transmission layer 12, reflected on the reflection surface 16 positioned on a side opposite to a surface where the signal light input/output part 15 is arranged, transmitted to the signal light input/output part 15 and received by the light receiving element 14 optically coupled to the signal light input/output part 15. Thus, without changing the size of the optical data bus 11, the optical path of the signal light propagated inside the optical data bus 11 is prolonged to the double. |
