| 摘要 |
PROBLEM TO BE SOLVED: To make leakage light of residual excitation light or signal light less likely to concentrate on a portion of a resin layer covering a connection part between optical fibers.SOLUTION: An optical device (1) comprises a first optical fiber (11), a second optical fiber (12), and a connection part resin layer (14) covering claddings (22 and 32) at a fusion splicing part (13) of the first and second optical fibers (11 and 12) and containing fillers (15). |
