Chirping optical fibre Bragg gratings using tapered-thickness piezoelectric ceramic

Abstract
A new technique is reported for producing variable chirping by a uniform optical fibre Bragg grating. The chirp is obtained by applying a strain gradient through the use of a tapered-thickness piezoelectric ceramic. The grating bandwidth has been increased from ~0.15 to ~0.34 nm with a ratio of ~0.415 pm/V.