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Appl Opt. 2005 Aug 20;44(24):5101-4.

Bending effect on fiber acousto-optic mode coupling.

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  • 1Department of Electronic Engineering, Tsinghua University, Beijing 100084, China.


The acousto-optic effect in a bent fiber is studied experimentally and numerically by using the scalar finite-element method. The resulting transmission spectra show that new mode-coupling peaks appear due to the breaking of the mode spatial symmetry. The strength of new peaks increases as the fiber-bending curvature increases with a redshift or blueshift in wavelength, strongly depending on the orientation of fiber bending with respect to the acoustic-wave vibration direction.

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