Patent ID: 6580855
Filing Date: 2003-06-17
Classification: G02B,G02F

Abstract:
A bandwidth tunable fiber Bragg grating (FBG) device for tuning an optical transmission circuit comprised of:a plurality of Bragg gratings in cascade along an optical fiber providing a strain gradient along its length in order to create sufficient chirp; said cascaded Bragg gratings embedded inside a compliant material positioned in the compliant material such that one end of it is near the edge of the compliant material allowing for a built-in strain gradient near the edge of the grating; said embedded gratings placed in an assembly capable of providing variable amounts of transverse loading along various locations on the surface of the compliant material resulting in a longitudinal strain gradient in the gratings, thus inducing chirp; and means for varying the grating chirp by changing the magnitude of the transverse loads applied at the various locations through a predetermined range thereby tuning the dispersion in the optical fiber.