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Four-port fibre frequency-shifter with a null taper coupler

Birks, T.A., Farwell, S.G., Russell, P.St.J. and Pannell, C.N. (1994) Four-port fibre frequency-shifter with a null taper coupler Optics Letters, 19, (23), pp. 1964-1966. (doi:10.1364/OL.19.001964).

Record type: Article


A prototype of a new design of fiber frequency shifter, based on a special four-port fused taper coupler with a null maximum coupling ratio, is reported. In this coupler the constituent fibers are so dissimilar that the maximum coupling is (ideally) zero. In the presence of a flexural acoustic wave, light is coupled between the fibers, acquiring a frequency shift in the process. Near 100% conversion with 30-dB sideband and carrier suppression is achieved, in an unoptimized device, for just 1 mW of electrical drive power.

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Published date: 1994


Local EPrints ID: 78246
ISSN: 0146-9592
PURE UUID: cc11234f-1f3a-4b36-9530-a0dfd04c6564

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Date deposited: 11 Mar 2010
Last modified: 18 Jul 2017 23:25

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Author: T.A. Birks
Author: S.G. Farwell
Author: P.St.J. Russell
Author: C.N. Pannell

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