{"id":"https://openalex.org/A5102006052","orcid":"https://orcid.org/0000-0003-4443-1219","observed_orcids":["https://orcid.org/0000-0003-4443-1219"],"display_name":"K. Okamoto","raw_author_names":["K. Okamoto","Ken OKAMOTO","Ken Okamoto"],"full_name":"Ken OKAMOTO","works_count":99,"cited_by_count":2928,"summary_stats":{"2yr_mean_citedness":0.0,"h_index":31,"i10_index":55},"ids":{"openalex":"https://openalex.org/A5102006052","orcid":"https://orcid.org/0000-0003-4443-1219","observed_orcids":["https://orcid.org/0000-0003-4443-1219"]},"affiliations":[{"institution":{"id":"https://openalex.org/I2251713219","ror":"https://ror.org/00berct97","display_name":"NTT (Japan)","country_code":"JP","type":"company","lineage":["https://openalex.org/I2251713219"]},"years":[2022,2021,2020,2019,2018,2017,2016,2015,2014,2009,2006,2005,2003,2002,2001,2000,1999,1998,1997,1996,1995,1994,1993,1990,1988,1987,1986,1985,1984,1983,1982,1981,1980,1979,1978]},{"institution":{"id":"https://openalex.org/I43439940","ror":"https://ror.org/01ryk1543","display_name":"University of Southampton","country_code":"GB","type":"education","lineage":["https://openalex.org/I43439940"]},"years":[1983]},{"institution":{"id":"https://openalex.org/I4405276141","ror":"https://ror.org/04ww4v994","display_name":"NTT Innovative Devices Corporation (Japan)","country_code":"JP","type":"company","lineage":["https://openalex.org/I4405276141"]},"years":[2003,2002]},{"institution":{"id":"https://openalex.org/I74801974","ror":"https://ror.org/057zh3y96","display_name":"The University of Tokyo","country_code":"JP","type":"education","lineage":["https://openalex.org/I74801974"]},"years":[1978,1977]}],"last_known_institutions":[{"id":"https://openalex.org/I2251713219","ror":"https://ror.org/00berct97","display_name":"NTT (Japan)","country_code":"JP","type":"company","lineage":["https://openalex.org/I2251713219"]}],"topics":[{"id":"https://openalex.org/T10232","display_name":"Optical Network Technologies","count":58,"subfield":{"id":"https://openalex.org/subfields/2208","display_name":"Electrical and Electronic Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10846","display_name":"Photonic Crystal and Fiber Optics","count":37,"subfield":{"id":"https://openalex.org/subfields/2208","display_name":"Electrical and Electronic Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10299","display_name":"Photonic and Optical Devices","count":35,"subfield":{"id":"https://openalex.org/subfields/2208","display_name":"Electrical and Electronic Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10767","display_name":"Advanced Photonic Communication Systems","count":33,"subfield":{"id":"https://openalex.org/subfields/2208","display_name":"Electrical and Electronic Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10205","display_name":"Advanced Fiber Optic Sensors","count":22,"subfield":{"id":"https://openalex.org/subfields/2208","display_name":"Electrical and Electronic Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"topic_share":[{"id":"https://openalex.org/T10232","display_name":"Optical Network Technologies","value":0.0002231,"subfield":{"id":"https://openalex.org/subfields/2208","display_name":"Electrical and Electronic Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10846","display_name":"Photonic Crystal and Fiber Optics","value":0.0001835,"subfield":{"id":"https://openalex.org/subfields/2208","display_name":"Electrical and Electronic Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10767","display_name":"Advanced Photonic Communication Systems","value":0.0001575,"subfield":{"id":"https://openalex.org/subfields/2208","display_name":"Electrical and Electronic Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10299","display_name":"Photonic and Optical Devices","value":0.0001146,"subfield":{"id":"https://openalex.org/subfields/2208","display_name":"Electrical and Electronic Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10205","display_name":"Advanced Fiber Optic Sensors","value":0.0001093,"subfield":{"id":"https://openalex.org/subfields/2208","display_name":"Electrical and Electronic Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"x_concepts":[{"id":"192562407","wikidata":"https://www.wikidata.org/wiki/Q228736","display_name":"Materials science","score":0.8538873195648193},{"id":"120665830","wikidata":"https://www.wikidata.org/wiki/Q14620","display_name":"Optics","score":0.8439497351646423},{"id":"41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","score":0.8004435300827026},{"id":"49040817","wikidata":"https://www.wikidata.org/wiki/Q193091","display_name":"Optoelectronics","score":0.5495256185531616},{"id":"121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","score":0.5467660427093506}],"counts_by_year":[{"year":1977,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":1978,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":1979,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":1980,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":1981,"works_count":3,"oa_works_count":0,"cited_by_count":0},{"year":1982,"works_count":4,"oa_works_count":0,"cited_by_count":0},{"year":1983,"works_count":5,"oa_works_count":0,"cited_by_count":0},{"year":1984,"works_count":2,"oa_works_count":0,"cited_by_count":0},{"year":1985,"works_count":4,"oa_works_count":0,"cited_by_count":0},{"year":1986,"works_count":8,"oa_works_count":0,"cited_by_count":0},{"year":1987,"works_count":2,"oa_works_count":0,"cited_by_count":0},{"year":1988,"works_count":4,"oa_works_count":0,"cited_by_count":0},{"year":1990,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":1993,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":1994,"works_count":3,"oa_works_count":0,"cited_by_count":0},{"year":1995,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":1996,"works_count":3,"oa_works_count":0,"cited_by_count":0},{"year":1997,"works_count":2,"oa_works_count":0,"cited_by_count":0},{"year":1998,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":1999,"works_count":5,"oa_works_count":0,"cited_by_count":0},{"year":2000,"works_count":2,"oa_works_count":0,"cited_by_count":0},{"year":2001,"works_count":6,"oa_works_count":0,"cited_by_count":0},{"year":2002,"works_count":8,"oa_works_count":0,"cited_by_count":0},{"year":2003,"works_count":3,"oa_works_count":0,"cited_by_count":0},{"year":2004,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":2005,"works_count":2,"oa_works_count":0,"cited_by_count":0},{"year":2006,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":2009,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":2012,"works_count":0,"oa_works_count":0,"cited_by_count":86},{"year":2013,"works_count":1,"oa_works_count":0,"cited_by_count":64},{"year":2014,"works_count":2,"oa_works_count":0,"cited_by_count":62},{"year":2015,"works_count":1,"oa_works_count":0,"cited_by_count":69},{"year":2016,"works_count":2,"oa_works_count":0,"cited_by_count":82},{"year":2017,"works_count":4,"oa_works_count":0,"cited_by_count":68},{"year":2018,"works_count":3,"oa_works_count":1,"cited_by_count":64},{"year":2019,"works_count":2,"oa_works_count":0,"cited_by_count":68},{"year":2020,"works_count":4,"oa_works_count":1,"cited_by_count":63},{"year":2021,"works_count":2,"oa_works_count":1,"cited_by_count":75},{"year":2022,"works_count":1,"oa_works_count":1,"cited_by_count":68},{"year":2023,"works_count":0,"oa_works_count":0,"cited_by_count":76},{"year":2024,"works_count":0,"oa_works_count":0,"cited_by_count":44},{"year":2025,"works_count":0,"oa_works_count":0,"cited_by_count":42},{"year":2026,"works_count":0,"oa_works_count":0,"cited_by_count":25}],"display_name_alternatives":["K. Okamoto","Ken OKAMOTO","Ken Okamoto"],"block_key":"k okamoto","works_api_url":"https://api.openalex.org/works?filter=author.id:A5102006052","awards_count":0,"updated_date":"2026-11-08T12:57:04","created_date":"2016-06-24T00:00:00"}
