Fusion splicing device and fusion splicing method

摘要

Problem to be solved: to provide a technique for aligning and fusion splicing of an optical fiber to be connected without placing a measuring instrument at a position away from the position where the optical fiber is fused and bonded.The first optical fiber and the second optical fiber are held in such a manner that the end face of the first optical fiber FB1 is opposed to the end surface of the second optical fiber FB2, and the optical fiber is bent from the side of the first optical fiber to the core of the first optical fiber so that light can be incident into the core of the first optical fiber.The optical input part 20 receives light propagating in the direction of the second optical fiber from the side of the bent portion of the first optical fiber to the first optical fiber.The control part 10 performs the rotation control of at least one of the first optical fiber and the second optical fiber based on the measured value of the power of light propagating in the clad of the second optical fiber, and the core is aligned between the first optical fiber and the second optical fiber. The alignment between the first optical fiber and the second optical fiber is performed in the state where alignment is performed.Diagram