ULTRAVIOLET SENSOR BASED ON AZOBENZENE?COATED FIBER BRAGG GRATING AND APPARATUS FOR DETECTING ULTRAVIOLET RAY USING THEREOF

摘要

PURPOSE: An ultraviolet light sensor based on an optical fiber lattice where an azobenzene polymer is coated and ultraviolet light detecting device using the same are provided to easily manufacture an ultraviolet detecting sensor by coating an azobenzene polymer on optical fiber where a fiber brag grating is formed and easily measure strength of ultraviolet lights. CONSTITUTION: An ultraviolet light sensor based on an optical fiber lattice where an azobenzene polymer is coated comprises optical fibers(10) and azobenzene polymer(20). The optical fibers comprise an optical fiber brag lattice. The azobenzene polymer is coated on the optical fibers. When the azobenzene polymer is exposed to the ultraviolet lights, the azobenzene polymer increases an optical fiber core lattice period by inducing a tension in the optical fibers, thereby moving center wavelength of the optical fiber brag lattice to a long wavelength.