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Conferences > CLEO > 1995 > CMG > CMG6
  • Conference on Lasers and Electro-Optics
  • OSA Technical Digest (Optica Publishing Group, 1995),
  • paper CMG6

High-performance four-port acousto-optic frequency shifter at 1.55 μm using standard single-mode telecommunications fiber

D. O. Culverhouse, S. G. Farwell, T. A. Birks, P. St. J. Russell, and C. N. Pannell

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Abstract

If a four-port fused-taper coupler is constructed from dissimilar fibers, the maximum splitting ratio can be dose to zero over a broad spectral band. As previously shown, such a null coupler can be used to form an effective four-port acousto-optic frequency shifter.1 In Ref. 1, two dissimilar nonstandard fibers were used. Here we report the successful construction of a null coupler made by using standard telecommunications fiber. The procedure involves pretapering one of an identical pair of fibers to provide the necessary dissimilarity.2

© 1995 Optical Society of America

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