Abstract

There are many applications in which small amounts of light need to be tapped out of an optical fiber. Linear tapped busses can be attractive if light from a common optical waveguide can be distributed to several spatially separated nodes. A useful arrangement might be to tap a small amount of power (0.1 dB ≈ 2%) at discrete points so that more than ten nodes can be interconnected before a significant amount of power is lost [Fig. 1(a)]. A commercial version is available but expensive. It is fabricated from a silicacore fiber that has a fluorinated polymer cladding. A small portion of the cladding is removed, and a launch or tap fiber is attached with an index-matched adhesive.1 The tapping fraction is controlled by carefully controlling the angle between the tap and bus fibers.

© 1989 Optical Society of America

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