We present experimental measurements of the peak splitting of the reflection spectra of fiber Bragg gratings as a result of birefringence induced by transverse loading of a multicore fiber. Measurements show that the splitting is a function of the applied load and the direction of the load relative to the azimuth of the fiber. A model for calculating the stress in the fiber that is due to an applied load is in good agreement with our experimental observations.
© 2004 Optical Society of America
Manuel Silva-Lopez, Cheng Li, William N. MacPherson, Andrew J. Moore, James S. Barton, Julian D. C. Jones, Donghui Zhao, Lin Zhang, and Ian Bennion, "Differential birefringence in Bragg gratings in multicore fiber under transverse stress," Opt. Lett. 29, 2225-2227 (2004)