| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical device, having a fusion splicing part, which can prevent a decrease in beam quality.SOLUTION: In an optical device 1, fusion-spliced optical fibers F1 and F2 are fixed to a reinforcement member 13. The optical fiber F2 is a multimode optical fiber. A tension producing a higher magnitude strain than 1 microstrain is imparted to the optical fibers F1 and F2. |
