Abstract
A novel form of demultiplexer is demonstrated using a single untapered length of twin-core fiber. The degree of demultiplexing can be varied so that an arbitrary amount of power at a given wavelength (e.g., 1.3 mu m) can be removed from a multiplex to two wavelengths (e.g., 1.3/1.55 mu m). The variation is achieved by locally bending the fiber in the plane of the twin cores. Channel spacings of 30 nm have been achieved experimentally.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
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