| 摘要 |
A compact and multiple optical fiber coupler in which plural fused- tapered coupler portions 13-1 and 13-2, which have plural optical fibers 11a - 1, 11b-1, 11a-2 and 11b-2 to form optical couplers, are formed side by side on a common substrate 15 and the fused-tapered coupler portions formed integral with the substrate 15 are enclosed in a package 160.
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