Dispersion tuning of a chirped fiber Bragg grating using a multisectional bending structure

A new method to adjust the dispersion of a fiber grating with enhanced flexibility and accuracy is described. The proposed method involves bending a fiber grating attached on a metal beam with multisectional bending scheme. The device is composed of several pairs of bolts which hold the metal beam at designated deflection positions. Because the curvature induced by bending defines the local strain, the strain distribution along the fiber can be tailored by positioning the pairs of bolts according to designated deflection curve. We demonstrated linear and quadratic dispersion tuning by using the proposed method.