Effective refractive index chirped bragg gratings

A method for preparing a chirped Bragg grating, the method comprising the application of a temperature gradient to a Bragg grating having uniform periodicity.

A method for preparing a chirped Bragg grating, the method comprising gray-scale exposure of a photorefractive optical waveguide followed by preparation therewithin of a uniform period Bragg grating.

An apparatus which simultaneously provides combined chromatic dispersion compensation and chromatic dispersion slope compensation comprising a uniform-period Bragg grating, a substrate, a first heater disposed between said uniform-period Bragg grating and said substrate, and a second heater disposed on a side of said chirped Bragg grating opposite to said first heater, one of said heaters comprising an essentially parabolic shape in width or in thickness, and the other of said heaters providing an essentially trapezoidal profile in width or in thickness, said heaters being disposed such that upon activation to provide heat, both a parabolic temperature profile and a linear temperature profile will be superposed upon said uniform-period Bragg grating.

An apparatus that provides polarization-independent chromatic dispersion or chromatic dispersion slope compensator comprising a polarization eigenmode splitter/combiner and two chromatic dispersion or chromatic dispersion slope compensators.

An apparatus for multiplexing and/or demultiplexing an optical signal, the apparatus comprising a chromatic dispersion compensator or chromatic dispersion slope compensator, said compensator comprising an effective-refractive-index-chirped uniform-period Bragg grating.