Tunable chirped fiber grating device and method for forming chirped fiber grating

摘要

A tunable chirped grating device an optical fiber having the same spacings between index perturbations, a piezoelectric element bonded to the optical fiber, for changing the perturbation spacings according to an applied voltage, and a voltage source for applying the voltage to the piezoelectric element. Since a predetermined piezoelectric element is bonded to an optical fiber provided with a grating having regular spacings and the perturbation spacings can be differently deformed by applying different electric field to respective perturbation positions by the piezoelectric element, and the chirping rates of the reflected wavelengths waves can be adjusted, a chirped grating device whose manufacturing procedure is simple and which has flexibility can be provided. IMAGE