Patent ID: 6363187
Filing Date: 2002-03-26
Classification: H04B

Abstract:
A method of providing adjustable linear dispersion by causing light to make first and second spectrally distributed reflections respectively in first and second optical waveguides provided with associated first and second chirped Bragg grating reflectors having quadratic components of chirp of opposite sign and substantially matched modulus, each one of said Bragg grating reflectors having an effective pitch which is a function of position along said Bragg grating reflector, and which is a mathematical product, which mathematical product is the mathematical product of its physical pitch at that position with a value of effective refractive index, which value of effective refractive index is the value of the effective refractive index of the waveguide associated with said Bragg reflector, in which method an adjustment of linear dispersion is provided by a differential scaling of the effective pitches of the two Bragg grating reflectors.