Two-way optical communication device, two-way optical communication system, and method for assembling two-way optical communication device
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United States of America Patent
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Sep 30, 2003
Grant Date -
Apr 11, 2002
app pub date -
Aug 9, 2001
filing date -
Aug 10, 2000
priority date (Note) -
Expired
status (Latency Note)
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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, comprises 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. An optical member including the reflection mirror is provided closer to the optical fiber than the light emitting element. The incoming light emitted from the optical fiber is reflected by the first surface of the reflection mirror to be guided to the photodetector. 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.
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