Bidirectional optical transmission device

摘要

A bidirectional optical transmission device (1) has a housing (2) having a guide portion (2b) in which an end of a single optical fiber (3) is to be inserted. A light-receiving device (1a) and a light-emitting device (1b) are provided in the housing (2). Light path restricting members (11) are provided in the light-receiving device (1a) so as to restrict light beams entering the light-receiving device (1a).