Chirp-free tuning of fiber Bragg grating using a cantilever beam

A new approach for tuning the wavelength of a fiber Bragg grating without c hirping is demonstrated. Tuning is achieved by bending a triangular cantile ver beam with the grating was epoxied on its surface. The isosceles triangl e was firmly fixed at its base and bending was realised by exerting a force to its vertex. Chirp-free tuning of a fiber Bragg grating over a wavelengt h range of 4.52 nm is demonstrated. Using a correction index of 0.7, the ex perimental results are in good agreement with the theoretical values.