| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical combiner allowing improvement in reliability, a laser apparatus using the same, and a manufacturing method of the optical combiner.SOLUTION: An optical combiner 3 comprises: a plurality of input optical fibers 10; an output optical fiber 20; and a plurality of bridge fibers 60, 50 provided between the plurality of input optical fibers 10 and the output optical fiber 20 and optically coupled to each other. A ratio of outer diameters of cladding 62, 52 to outer diameters of cores 61, 51 in the respective bridge fibers 60, 50 is smaller in the bridge fiber positioned away from the input optical fibers 10 than that closer to the input optical fibers. |
