Optical EngineeringSimple tunable chirp of fiber Bragg gratings without center wavelength shift
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We propose a simple tunable chirping technique for uniform Bragg gratings. This technique consists of the application of a uniform Bragg grating to a lateral side of a beam at a particular angle with respect to the beam neutral axis. We demonstrate that it is possible to obtain a tuned linear or quadratic chirp without a center wavelength shift by means of two bending geometries, a beam with simply supported ends and a cantilever beam.