Patent ID: 6626584
Filing Date: 2003-09-30
Classification: G02B

Abstract:
A two-way optical communication device for use in a two-way optical communication system for transmitting and receiving an optical signal via a single optical fiber, comprising:a light emitting element for generating transmitted light; a photodetector for receiving incoming light emitted from the optical fiber; and a reflection mirror made of a thin film having a high reflectance, having first and second surfaces, the first surface being opposite to the second surface, wherein: an optical member including the reflection mirror is provided closer to the optical fiber than the light emitting element; the first surface is provided on the photodetector side and the second surface is provided on the light emitting element side; the incoming light emitted from the optical fiber is reflected by the first surface of the reflection mirror to be guided to the photodetector; and the transmitted light emitted from the light emitting element, or the transmitted light reflected by an end surface of the optical fiber, is reflected by at least a portion of the second surface of the reflection mirror to prevent the transmitted light from entering the photodetector.