Fiber birefringence is induced during UV exposure because of absorption and beam focusing. Both effects have a small, comparable magnitude and opposite signs. Form birefringence does not explain the observed polarization dependence of FBGs.
© 2004 Optical Society of America
(060.0060) Fiber optics and optical communications : Fiber optics and optical communications
(060.2270) Fiber optics and optical communications : Fiber characterization
(060.2340) Fiber optics and optical communications : Fiber optics components
X. Daxhelet, N. Godbout, and S. Lacroix, "Form birefringence of fiber Bragg gratings due to UV exposure anisotropy," in Optical Fiber Communication Conference, Technical Digest (CD) (Optical Society of America, 2004), paper ThC2.