| 摘要 |
PROBLEM TO BE SOLVED: To provide a method to form a fiber Bragg grating by continuously sublimating, burning and removing and irradiating coated resin with an ultraviolet laser beam without adopting an independent step for removing the coat, which is conventionally adopted in a step for manufacturing the fiber Bragg grating by an irradiation with the ultraviolet laser beam. SOLUTION: When the fiber Bragg grating is manufactured without removing the coated resin by a phase mask method, an optical fiber is arranged close to or in contact with the phase mask and the coating resin is sublimated, burned and scattered, and the mask is contaminated, thus the phase mask can not be reused. In a two luminous flux interference method, the optical fiber is arranged at a position remote from the phase mask and a reflection mirror, these items are not damaged. The fiber Bragg grating is formed by further continuous irradiation with the laser ultraviolet laser beam even after sublimating and burning the coated resin, thus the step for removing the coated resin is dispensed of in the manufacturing step of the fiber Bragg grating. COPYRIGHT: (C)2006,JPO&NCIPI |
