Abstract

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.

© 1994 Optical Society of America

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Corrections

T. A. Birks, S. G. Farwell, P. St. J. Russell, and C. N. Pannell, "Four-port fiber frequency shifter with a null taper coupler: erratum," Opt. Lett. 21, 231-231 (1996)
http://proxy.osapublishing.org/ol/abstract.cfm?uri=ol-21-3-231

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