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.
© 2005 Optical Society of America
Jianhui Zhao, Xiaoming Liu, Yan Wang, and Ye Luo, "Bending effect on fiber acousto-optic mode coupling," Appl. Opt. 44, 5101-5104 (2005)