| 摘要 |
PROBLEM TO BE SOLVED: To provide an inexpensive optical isolator device eliminated in the position deviation of the optical axis of a ceramic capillary and an optical isolator element, and improved in the optical characteristics of a light insertion loss and backward insertion loss. SOLUTION: In this optimal isolator device constituted of an optical isolator element 2, a ceramic capillary, an optical fiber and a connector, a ring-shaped part 1 is attached to the edge face of a ceramic capillary 4a, and the optical isolator element 2 is positioned by the ring-shaped part 1, and the optical isolator element 2 is adhered and fixed to the edge face of a ceramic capillary 4a.
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