Patent ID: 8855150

Claim:
A tiled Bragg grating (BG), comprising: a plurality of BGs paralleled and optically contacted to one another to limit at least one of material defects realized for each individual BG and energy threshold for each BG compared to a single BG having a same size as the plurality of BGs optically contacted to one another, each said BG comprising: an optically transparent substrate within a predetermined wavelength or wavelength range having a length dimension and a transverse dimension perpendicular to the length dimension; a grating period along said length dimension, and optical contact regions along edges of the BG in said transverse dimension where said BGs are optically contacted to one another along the optical contact regions, wherein said optical contact regions extend between said BGs in the length dimension and wherein said optical contact regions are imperceptible seams such that the plurality of BGs are optically indistinguishable from a single-piece of the optically transparent substrate.