Patent 7088748 was granted and assigned to Bookham Technology on August, 2006 by the United States Patent and Trademark Office.
A tuneable laser having an active section, a phase section and a Bragg reflector comprising a plurality of descrete grating units, at least two of which gratings have a discrete pitch, wherein at least two of the gratings having a different pitch are each provided with a plurality of independently actuable electrodes.