Type I infrared ultrafast laser induced fiber Bragg gratings have been shown to exhibit higher-order resonances related to the Fourier components possessed by their nonsinusoidal index change profile. Using successive higher-order phase masks, we determine the Fourier components of type I-IR gratings in both hydrogen-loaded and unloaded fiber. Knowledge of the relative dc and ac components of a fiber Bragg grating is required for tailoring its spectral response.
© 2007 Optical Society of America
Original Manuscript: January 29, 2007
Manuscript Accepted: March 15, 2007
Published: May 1, 2007
Christopher W. Smelser, Stephen J. Mihailov, and Dan Grobnic, "Characterization of Fourier components in type I infrared ultrafast laser induced fiber Bragg gratings," Opt. Lett. 32, 1453-1455 (2007)