A new method of wavelength demultiplexing is identified which makes use of the wavelength and bend radius dependence of the pure bend loss at single radius bends in a single-mode fi ber. The light leaving the fiber at a bend forms one output of the demultiplexer.Equations are derived which predict the bend radii for the most effi cient operation of the demultiplexer and the power extracted from the fiber at each wavelength. Tbe demultiplexer operates over the wave length range corresponding to V numbers from 2.4 to 1.6. A two waVe length demultiplexer formed from 90° bends is constructed and tested. Collection eftlelencies of 70 percent and insertion losses of less than 2 dB are sbown to be possible. Crosstalk isolation in excess of 40 dB can be achieved with tbe aid of optical wavelength filters. The performance of a th�ee wavelength demultiple�er 'is also considered.
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