Optical data bus system

Abstract

Abstract PURPOSE:To reduce the insertion loss due to the coupler and then increase the efficiency of transmission, by performing the branching in the optical data bus system by means of the T-type coupler consisting of the photodetector connected weakly to the main line. CONSTITUTION:The T-type two-way couplers C1-CN are connected to the branching point of the data bus F having an end and formed with the optical fiber, and the stations S1-SN possessing the transmitters D1-DN plus the receivers R1- RN are connected to the couplers C1-CN. For the structure of these couplers, the optical fiber (d) of the transmission branch line plus the optical fiber (r) of the reception branch line are set in a fixed length each along the optical fiber (f) of the main line to be connected weakly to the data bus F and in parallel to each other. And in case the maximum allowance of the brnaching point is defined as N, the couplers C1-CN whose coupling degree are set to the level near the reciprocal of N or less are used. Thus the loss caused by insertion of these couplers can be reduced.

Inventors

• 👤 Ichiu Watabe
• 👤 Kiyoharu Inao

Bibliographic Details