{"_buckets": {"deposit": "e7d67a9b-58cf-4e02-8aab-ff7c43a4da76"}, "_deposit": {"id": "7917", "owners": [], "pid": {"revision_id": 0, "type": "depid", "value": "7917"}, "status": "published"}, "_oai": {"id": "oai:kitami-it.repo.nii.ac.jp:00007917", "sets": ["9"]}, "item_5_alternative_title_18": {"attribute_name": "\u305d\u306e\u4ed6\u306e\u30bf\u30a4\u30c8\u30eb", "attribute_value_mlt": [{"subitem_alternative_title": "Initial structures of function-expansion-based topology optimization for three dimensional optical waveguide devices"}]}, "item_5_biblio_info_6": {"attribute_name": "\u66f8\u8a8c\u60c5\u5831", "attribute_value_mlt": [{"bibliographicIssueDates": {"bibliographicIssueDate": "2012-07", "bibliographicIssueDateType": "Issued"}, "bibliographicPageEnd": "214", "bibliographicPageStart": "209", "bibliographicVolumeNumber": "OPE2012", "bibliographic_titles": [{"bibliographic_title": "\u4fe1\u5b66\u6280\u5831"}]}]}, "item_5_description_4": {"attribute_name": "\u6284\u9332", "attribute_value_mlt": [{"subitem_description": "\u95a2\u6570\u5c55\u958b\u6cd5\u306b\u57fa\u3065\u304f\u30c8\u30dd\u30ed\u30b8\u30fc\u6700\u9069\u5316\u3092\u7528\u3044\u305f3\u6b21\u5143\u5149\u5c0e\u6ce2\u8def\u306e\u81ea\u52d5\u6700\u9069\u8a2d\u8a08\u306b\u304a\u3051\u308b\u521d\u671f\u69cb\u9020\u306e\u691c\u8a0e\u3092\u884c\u3063\u3066\u3044\u308b.\u30c8\u30dd\u30ed\u30b8\u30fc\u6700\u9069\u5316\u3055\u308c\u305f2\u6b21\u5143\u5149\u5c0e\u6ce2\u8def\u30923\u6b21\u5143\u5149\u5c0e\u6ce2\u8def\u306b\u5bfe\u3059\u308b\u30c8\u30dd\u30ed\u30b8\u30fc\u6700\u9069\u5316\u306e\u521d\u671f\u69cb\u9020\u306b\u7528\u3044\u3066\u3044\u308b.\u672c\u624b\u6cd5\u30923\u5206\u5c90\u5149\u5c0e\u6ce2\u8def\u306e\u6700\u9069\u8a2d\u8a08\u306b\u9069\u7528\u3059\u308b\u3053\u3068\u3067,\u5f93\u6765\u306e\u624b\u6cd5\u3068\u6bd4\u3079\u3066\u7c21\u5358\u306a\u6700\u9069\u69cb\u9020\u304c\u5f97\u3089\u308c\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3057\u3066\u3044\u308b.\u521d\u671f\u69cb\u9020\u306b\u4e0e\u3048\u308b\u30b0\u30ec\u30a4\u9818\u57df\u306e\u5e83\u3055\u3068\u89e3\u306e\u53ce\u675f\u6027\u306b\u3064\u3044\u3066\u3082\u691c\u8a0e\u3092\u884c\u3063\u3066\u3044\u308b.\nTo achieve optical waveguides with desired transmission characteristics, we study on initial structures of the function-expansion-based topology optimization for three-dimensional optical waveguide devices. A topology optimized two-dimensional optical waveguide is used as an initial structure of topology optimization for a three-dimensional optical waveguide. The proposed method is applied to optical waveguide branchings, and a simpler optimized structure is obtained. 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