A fiber Bragg grating bandpass filter has been investigated. The profile of the 3.1-cm-long grating was synthesized for high reflectivity and low dispersion by use of the iterative solution to the Gel’fand–Levitan–Marchenko equations. A grating designed according to this synthesis was written into a boron-codoped germanosilica fiber. The measured spectral response was in good agreement with simulations. The achieved in-band reflection was 97%, and the passband ripple was only 0.06 dB.
© 1998 Optical Society of America
J. Skaar, B. Sahlgren, P.-Y. Fonjallaz, H. Storøy, and R. Stubbe, "High-reflectivity fiber-optic bandpass filter designed by use of the iterative solution to the Gel’fand-Levitan-Marchenko equations," Opt. Lett. 23, 933-935 (1998)