Slanted Bragg grating gain flattening filter having...

Details Slanted Bragg grating gain flattening filter having... Slanted Bragg grating gain flattening filter having...

2008-05-20

2008-05-20

Doan, Jennifer (Department: 2874)

Optical waveguides

With optical coupler

Input/output coupler

C385S015000, C385S031000

Reexamination Certificate

active

07376306

ABSTRACT:
An optical filter comprises a waveguide and a plurality of Slanted Bragg Gratings written in the waveguide, wherein at least two of the Slanted Bragg Gratings overlap one another. A method of producing an optical filter comprises the steps of passing an ultraviolet light through a first portion of a chirped phase mask onto a first portion of a photosensitive waveguide so as to form a first Slanted Bragg Grating in the first portion of the waveguide and passing the ultraviolet light through a second portion of the chirped phase mask onto a second portion of the photosensitive waveguide so as to form a second Slanted Bragg Grating in the second portion of the waveguide, wherein the first and second Slanted Bragg Gratings overlap one another. A further annealing step may cause a spectrum of the filter to match a target spectrum.

REFERENCES:
patent: 5638473 (1997-06-01), Byron
patent: 6067391 (2000-05-01), Land
patent: 6275511 (2001-08-01), Pan et al.
patent: 6834144 (2004-12-01), Belmonte et al.
patent: 6954567 (2005-10-01), Molina et al.

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