Optical fiber duplex coupler
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United States of America Patent
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-
Jul 23, 1985
Grant Date -
N/A
app pub date -
May 11, 1983
filing date -
May 12, 1982
priority date (Note) -
Expired
status (Latency Note)
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Abstract
In a simple optical fibre duplex coupler of high light-coupling efficiency, two elongate optical guides are so arranged that, over a part of their lengths extending from one end of the coupler, one optical guide surrounds and is coaxial with the other optical guide with their neighboring end faces lying in a substantially common plane. At a position intermediate the ends of the coupler, the optical guides separate into distinct optical channels. The optical guides are surrounded by and enclosed in a body 1 of a transparent plastics material having a refractive index less than that of the outer optical guide. Preferably, the inner optical guide is a composite optical fibre and the outer optical guide is an elongate body of moulded transparent plastics material having a refractive index greater than that of the material of the cladding of the composite optical fibre.
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