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Propagation and optical interaction of guided acoustic waves in two-mode optical fibers

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4 Author(s)
Engan, H.E. ; W.W. Hansen Labs. of Phys., Stanford Univ., CA, USA ; Byoung Yoon Kim ; Blake, J.N. ; Shaw, H.J.

Acoustic modes propagating in cylindrical solid rods are considered. A review of the properties of several mode groups is given, and computed results are shown for a wide range of material properties. The lower mode of each group is relevant for an all-fiber-optic frequency shifter recently demonstrated. For these modes, dispersion relations, mode patterns, power relations, and acoustooptic coupling strength are calculated. Some experimental results are compared with the calculations, and alterations to improve the frequency shifter are proposed

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Lightwave Technology, Journal of  (Volume:6 ,  Issue: 3 )