| http://www.w3.org/ns/prov#value | - BRIEF DESCRIPTION OF THE DRAWINGS The above and other features and advantages of the present invention will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings in which: FIG. 1 is a perspective sectional view of an optical device having an optical waveguide including an organic Bragg grating sheet according to the present invention; FI
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