Abstract

A fiber Bragg grating bandpass filter with tailored refractive-index modulation is investigated. The writing method includes a position weighting technique, which provides flexible and accurate control of the index modulation along the fiber. This weighting is accomplished by adjusting the positions of a large number of overlapping subgratings to control the local grating strength. A 10-cm grating with a truncated $sin\left(x\right)/x$ refractive-index modulation function was written and characterized with this method, showing good agreement with simulations. These types of filter are well suited for wavelength-division-multiplexing applications and can be made to have steep edges, low sidelobes, large bandwidth, and low stopband ripple.

© 1997 Optical Society of America

High-reflectivity fiber-optic bandpass filter designed by use of the iterative solution to the Gel’fand–Levitan–Marchenko equations

J. Skaar, B. Sahlgren, P.-Y. Fonjallaz, H. Storøy, and R. Stubbe
Opt. Lett. 23(12) 933-935 (1998)

Bandpass engineering of lithographically scribed channel-waveguide Bragg gratings

Christoph Greiner, Thomas W. Mossberg, and Dmitri Iazikov
Opt. Lett. 29(8) 806-808 (2004)

Thermally tunable narrow-bandpass filter based on a linearly chirped fiber Bragg grating

S. Y. Li, N. Q. Ngo, S. C. Tjin, P. Shum, and J. Zhang
Opt. Lett. 29(1) 29-31 (2004)

Characterization of apodized fiber Bragg gratings for rejection filter applications

Appl. Opt. 36(36) 9378-9382 (1997)

Polarization control method for ultraviolet writing of advanced Bragg gratings

Jesper Bo Jensen, Nikolai Plougmann, Hans-Jürgen Deyerl, Poul Varming, Jörg Hübner, and Martin Kristensen
Opt. Lett. 27(12) 1004-1006 (2002)