BI-DIRECTIONAL OPTICAL COMMUNICATOR AND BI-DIRECTIONAL OPTICAL COMMUNICATION DEVICE

摘要

PROBLEM TO BE SOLVED: To provide an inexpensive and small-sized bi-directional optical communicator and a bi-directional optical communicating device realizing an all double system with a single line of optical fiber ad having a reduced transmission loss both in transmission and reception. SOLUTION: A transmission beam 13 emitted from a light emitting element 4 is converged by a transmission lens 6 and passes through a transmission area 9 of a light separating element 8 to be coupled with the optical fiber 2. A reception beam 15 emitted from the optical fiber 2 is reflected with a curved reflection surface 10 formed on the light separating element 8 surface to be coupled with a light receiving element 4. Part of the transmission beam 13 (reflected transmission beam 14) reflected by he optical fiber 2 passes through the transmission area 9 not to be coupled with the light receiving element 4.