{"id":"https://openalex.org/W1975897256","doi":"https://doi.org/10.1155/2009/398403","title":"Remote System for Detection of Low\u2010Levels of Methane Based on Photonic Crystal Fibres and Wavelength Modulation Spectroscopy","display_name":"Remote System for Detection of Low\u2010Levels of Methane Based on Photonic Crystal Fibres and Wavelength Modulation Spectroscopy","publication_year":2009,"publication_date":"2009-01-01","ids":{"openalex":"https://openalex.org/W1975897256","doi":"https://doi.org/10.1155/2009/398403","mag":"1975897256"},"language":"en","primary_location":{"id":"doi:10.1155/2009/398403","is_oa":true,"landing_page_url":"https://doi.org/10.1155/2009/398403","pdf_url":"https://downloads.hindawi.com/journals/js/2009/398403.pdf","source":{"id":"https://openalex.org/S96783963","display_name":"Journal of Sensors","issn_l":"1687-725X","issn":["1687-725X","1687-7268"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310319869","host_organization_name":"Hindawi Publishing Corporation","host_organization_lineage":["https://openalex.org/P4310319869"],"host_organization_lineage_names":["Hindawi Publishing Corporation"],"type":"journal"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Journal of Sensors","raw_type":"journal-article"},"type":"article","indexed_in":["crossref","doaj"],"open_access":{"is_oa":true,"oa_status":"hybrid","oa_url":"https://downloads.hindawi.com/journals/js/2009/398403.pdf","any_repository_has_fulltext":true},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5101600186","display_name":"J. P. Carvalho","orcid":"https://orcid.org/0000-0003-3633-7628"},"institutions":[{"id":"https://openalex.org/I4210125590","display_name":"Institute for Systems Engineering and Computers","ror":"https://ror.org/033wn8m60","country_code":"PT","type":"nonprofit","lineage":["https://openalex.org/I4210125590"]},{"id":"https://openalex.org/I182534213","display_name":"Universidade do Porto","ror":"https://ror.org/043pwc612","country_code":"PT","type":"education","lineage":["https://openalex.org/I182534213"]}],"countries":["PT"],"is_corresponding":true,"raw_author_name":"J. P. Carvalho","raw_affiliation_strings":["INESC Porto, Optoelectronics and Electronic Systems Unit, Rua do Campo Alegre 687, 4169-007 Porto, Portugal","Physics Department, Faculty of Sciences, University of Porto, Rua do Campo Alegre 687, 4169-007 Porto, Portugal"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"INESC Porto, Optoelectronics and Electronic Systems Unit, Rua do Campo Alegre 687, 4169-007 Porto, Portugal","institution_ids":["https://openalex.org/I4210125590"]},{"raw_affiliation_string":"Physics Department, Faculty of Sciences, University of Porto, Rua do Campo Alegre 687, 4169-007 Porto, Portugal","institution_ids":["https://openalex.org/I182534213"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5030283150","display_name":"H. Lehmann","orcid":null},"institutions":[{"id":"https://openalex.org/I2801349226","display_name":"Leibniz Institute of Photonic Technology","ror":"https://ror.org/02se0t636","country_code":"DE","type":"facility","lineage":["https://openalex.org/I2801349226","https://openalex.org/I315704651"]}],"countries":["DE"],"is_corresponding":false,"raw_author_name":"H. Lehmann","raw_affiliation_strings":["IPHT, Albert Einstein Strae 9, 07745 Jena, Germany","IPHT, Albert Einstein Stra\u00dfe 9, 07745 Jena, Germany"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"IPHT, Albert Einstein Strae 9, 07745 Jena, Germany","institution_ids":["https://openalex.org/I2801349226"]},{"raw_affiliation_string":"IPHT, Albert Einstein Stra\u00dfe 9, 07745 Jena, Germany","institution_ids":["https://openalex.org/I2801349226"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5040546819","display_name":"Hartmut Bartelt","orcid":"https://orcid.org/0000-0002-6369-9993"},"institutions":[{"id":"https://openalex.org/I2801349226","display_name":"Leibniz Institute of Photonic Technology","ror":"https://ror.org/02se0t636","country_code":"DE","type":"facility","lineage":["https://openalex.org/I2801349226","https://openalex.org/I315704651"]}],"countries":["DE"],"is_corresponding":false,"raw_author_name":"H. Bartelt","raw_affiliation_strings":["IPHT, Albert Einstein Strae 9, 07745 Jena, Germany","IPHT, Albert Einstein Stra\u00dfe 9, 07745 Jena, Germany"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"IPHT, Albert Einstein Strae 9, 07745 Jena, Germany","institution_ids":["https://openalex.org/I2801349226"]},{"raw_affiliation_string":"IPHT, Albert Einstein Stra\u00dfe 9, 07745 Jena, Germany","institution_ids":["https://openalex.org/I2801349226"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5014125084","display_name":"Fern\u00e3o D. Magalh\u00e3es","orcid":"https://orcid.org/0000-0002-4447-4473"},"institutions":[{"id":"https://openalex.org/I182534213","display_name":"Universidade do Porto","ror":"https://ror.org/043pwc612","country_code":"PT","type":"education","lineage":["https://openalex.org/I182534213"]},{"id":"https://openalex.org/I4210125590","display_name":"Institute for Systems Engineering and Computers","ror":"https://ror.org/033wn8m60","country_code":"PT","type":"nonprofit","lineage":["https://openalex.org/I4210125590"]}],"countries":["PT"],"is_corresponding":false,"raw_author_name":"F. Magalh\u00e3es","raw_affiliation_strings":["Department of Electrical and Computer Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, s/n 4200-065 Porto, Portugal","INESC Porto, Optoelectronics and Electronic Systems Unit, Rua do Campo Alegre 687, 4169-007 Porto, Portugal"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Electrical and Computer Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, s/n 4200-065 Porto, Portugal","institution_ids":["https://openalex.org/I182534213"]},{"raw_affiliation_string":"INESC Porto, Optoelectronics and Electronic Systems Unit, Rua do Campo Alegre 687, 4169-007 Porto, Portugal","institution_ids":["https://openalex.org/I4210125590"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5110339313","display_name":"Rodrigo Amezcua\u2010Correa","orcid":null},"institutions":[{"id":"https://openalex.org/I51601045","display_name":"University of Bath","ror":"https://ror.org/002h8g185","country_code":"GB","type":"education","lineage":["https://openalex.org/I51601045"]}],"countries":["GB"],"is_corresponding":false,"raw_author_name":"R. Amezcua-Correa","raw_affiliation_strings":["Department of Physics, University of Bath, Claverton Down, Bath BA2 7AY, UK"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Physics, University of Bath, Claverton Down, Bath BA2 7AY, UK","institution_ids":["https://openalex.org/I51601045"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5017036738","display_name":"J. L. Santos","orcid":"https://orcid.org/0000-0002-0818-4268"},"institutions":[{"id":"https://openalex.org/I4210125590","display_name":"Institute for Systems Engineering and Computers","ror":"https://ror.org/033wn8m60","country_code":"PT","type":"nonprofit","lineage":["https://openalex.org/I4210125590"]},{"id":"https://openalex.org/I182534213","display_name":"Universidade do Porto","ror":"https://ror.org/043pwc612","country_code":"PT","type":"education","lineage":["https://openalex.org/I182534213"]}],"countries":["PT"],"is_corresponding":false,"raw_author_name":"J. L. Santos","raw_affiliation_strings":["INESC Porto, Optoelectronics and Electronic Systems Unit, Rua do Campo Alegre 687, 4169-007 Porto, Portugal","Physics Department, Faculty of Sciences, University of Porto, Rua do Campo Alegre 687, 4169-007 Porto, Portugal"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"INESC Porto, Optoelectronics and Electronic Systems Unit, Rua do Campo Alegre 687, 4169-007 Porto, Portugal","institution_ids":["https://openalex.org/I4210125590"]},{"raw_affiliation_string":"Physics Department, Faculty of Sciences, University of Porto, Rua do Campo Alegre 687, 4169-007 Porto, Portugal","institution_ids":["https://openalex.org/I182534213"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5029763859","display_name":"J. Van Roosbroeck","orcid":"https://orcid.org/0000-0002-9469-1441"},"institutions":[{"id":"https://openalex.org/I4210118628","display_name":"Joint Research Center","ror":"https://ror.org/02ef88m96","country_code":"BE","type":"government","lineage":["https://openalex.org/I1320481043","https://openalex.org/I2800387288","https://openalex.org/I4210118628","https://openalex.org/I4210161702"]}],"countries":["BE"],"is_corresponding":false,"raw_author_name":"J. Van Roosbroeck","raw_affiliation_strings":["FOS&S, Cipalstraat 14, B-2440 Geel, Belgium"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"FOS&S, Cipalstraat 14, B-2440 Geel, Belgium","institution_ids":["https://openalex.org/I4210118628"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5106234118","display_name":"F. M. Ara\u00fajo","orcid":"https://orcid.org/0009-0009-5815-7565"},"institutions":[{"id":"https://openalex.org/I4210125590","display_name":"Institute for Systems Engineering and Computers","ror":"https://ror.org/033wn8m60","country_code":"PT","type":"nonprofit","lineage":["https://openalex.org/I4210125590"]}],"countries":["PT"],"is_corresponding":false,"raw_author_name":"F. M. Ara\u00fajo","raw_affiliation_strings":["INESC Porto, Optoelectronics and Electronic Systems Unit, Rua do Campo Alegre 687, 4169-007 Porto, Portugal"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"INESC Porto, Optoelectronics and Electronic Systems Unit, Rua do Campo Alegre 687, 4169-007 Porto, Portugal","institution_ids":["https://openalex.org/I4210125590"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5101407160","display_name":"Lu\u00eds Ferreira","orcid":"https://orcid.org/0000-0002-0292-8270"},"institutions":[{"id":"https://openalex.org/I4210125590","display_name":"Institute for Systems Engineering and Computers","ror":"https://ror.org/033wn8m60","country_code":"PT","type":"nonprofit","lineage":["https://openalex.org/I4210125590"]}],"countries":["PT"],"is_corresponding":false,"raw_author_name":"L. A. Ferreira","raw_affiliation_strings":["INESC Porto, Optoelectronics and Electronic Systems Unit, Rua do Campo Alegre 687, 4169-007 Porto, Portugal"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"INESC Porto, Optoelectronics and Electronic Systems Unit, Rua do Campo Alegre 687, 4169-007 Porto, Portugal","institution_ids":["https://openalex.org/I4210125590"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5042820406","display_name":"J. C. Knight","orcid":"https://orcid.org/0000-0002-0802-8804"},"institutions":[{"id":"https://openalex.org/I51601045","display_name":"University of Bath","ror":"https://ror.org/002h8g185","country_code":"GB","type":"education","lineage":["https://openalex.org/I51601045"]}],"countries":["GB"],"is_corresponding":false,"raw_author_name":"J. C. Knight","raw_affiliation_strings":["Department of Physics, University of Bath, Claverton Down, Bath BA2 7AY, UK"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Physics, University of Bath, Claverton Down, Bath BA2 7AY, UK","institution_ids":["https://openalex.org/I51601045"]}]}],"institutions":[],"countries_distinct_count":4,"institutions_distinct_count":10,"corresponding_author_ids":["https://openalex.org/A5101600186"],"corresponding_institution_ids":["https://openalex.org/I182534213","https://openalex.org/I4210125590"],"apc_list":{"value":2100,"currency":"USD","value_usd":2100},"apc_paid":{"value":2100,"currency":"USD","value_usd":2100},"fwci":1.1681,"has_fulltext":true,"cited_by_count":51,"citation_normalized_percentile":{"value":0.75136727,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":90,"max":99},"biblio":{"volume":"2009","issue":"1","first_page":null,"last_page":null},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T11111","display_name":"Spectroscopy and Laser Applications","score":0.9998999834060669,"subfield":{"id":"https://openalex.org/subfields/1607","display_name":"Spectroscopy"},"field":{"id":"https://openalex.org/fields/16","display_name":"Chemistry"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T11111","display_name":"Spectroscopy and Laser Applications","score":0.9998999834060669,"subfield":{"id":"https://openalex.org/subfields/1607","display_name":"Spectroscopy"},"field":{"id":"https://openalex.org/fields/16","display_name":"Chemistry"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10846","display_name":"Photonic Crystal and Fiber Optics","score":0.9962999820709229,"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/T12760","display_name":"Laser Design and Applications","score":0.98580002784729,"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"}}],"keywords":[{"id":"https://openalex.org/keywords/wavelength","display_name":"Wavelength","score":0.6642717123031616},{"id":"https://openalex.org/keywords/materials-science","display_name":"Materials science","score":0.6567380428314209},{"id":"https://openalex.org/keywords/modulation","display_name":"Modulation (music)","score":0.6442511081695557},{"id":"https://openalex.org/keywords/methane","display_name":"Methane","score":0.5706477165222168},{"id":"https://openalex.org/keywords/optoelectronics","display_name":"Optoelectronics","score":0.5582360029220581},{"id":"https://openalex.org/keywords/spectroscopy","display_name":"Spectroscopy","score":0.5516977906227112},{"id":"https://openalex.org/keywords/photonic-crystal","display_name":"Photonic crystal","score":0.4832066297531128},{"id":"https://openalex.org/keywords/crystal","display_name":"Crystal (programming language)","score":0.42729008197784424},{"id":"https://openalex.org/keywords/optics","display_name":"Optics","score":0.3890719711780548},{"id":"https://openalex.org/keywords/chemistry","display_name":"Chemistry","score":0.17696630954742432},{"id":"https://openalex.org/keywords/physics","display_name":"Physics","score":0.10216060280799866},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.07758268713951111},{"id":"https://openalex.org/keywords/acoustics","display_name":"Acoustics","score":0.04328683018684387}],"concepts":[{"id":"https://openalex.org/C6260449","wikidata":"https://www.wikidata.org/wiki/Q41364","display_name":"Wavelength","level":2,"score":0.6642717123031616},{"id":"https://openalex.org/C192562407","wikidata":"https://www.wikidata.org/wiki/Q228736","display_name":"Materials science","level":0,"score":0.6567380428314209},{"id":"https://openalex.org/C123079801","wikidata":"https://www.wikidata.org/wiki/Q750240","display_name":"Modulation (music)","level":2,"score":0.6442511081695557},{"id":"https://openalex.org/C516920438","wikidata":"https://www.wikidata.org/wiki/Q37129","display_name":"Methane","level":2,"score":0.5706477165222168},{"id":"https://openalex.org/C49040817","wikidata":"https://www.wikidata.org/wiki/Q193091","display_name":"Optoelectronics","level":1,"score":0.5582360029220581},{"id":"https://openalex.org/C32891209","wikidata":"https://www.wikidata.org/wiki/Q483666","display_name":"Spectroscopy","level":2,"score":0.5516977906227112},{"id":"https://openalex.org/C75302062","wikidata":"https://www.wikidata.org/wiki/Q900150","display_name":"Photonic crystal","level":2,"score":0.4832066297531128},{"id":"https://openalex.org/C2781285689","wikidata":"https://www.wikidata.org/wiki/Q21921428","display_name":"Crystal (programming language)","level":2,"score":0.42729008197784424},{"id":"https://openalex.org/C120665830","wikidata":"https://www.wikidata.org/wiki/Q14620","display_name":"Optics","level":1,"score":0.3890719711780548},{"id":"https://openalex.org/C185592680","wikidata":"https://www.wikidata.org/wiki/Q2329","display_name":"Chemistry","level":0,"score":0.17696630954742432},{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.10216060280799866},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.07758268713951111},{"id":"https://openalex.org/C24890656","wikidata":"https://www.wikidata.org/wiki/Q82811","display_name":"Acoustics","level":1,"score":0.04328683018684387},{"id":"https://openalex.org/C178790620","wikidata":"https://www.wikidata.org/wiki/Q11351","display_name":"Organic chemistry","level":1,"score":0.0},{"id":"https://openalex.org/C199360897","wikidata":"https://www.wikidata.org/wiki/Q9143","display_name":"Programming language","level":1,"score":0.0},{"id":"https://openalex.org/C62520636","wikidata":"https://www.wikidata.org/wiki/Q944","display_name":"Quantum mechanics","level":1,"score":0.0}],"mesh":[],"locations_count":2,"locations":[{"id":"doi:10.1155/2009/398403","is_oa":true,"landing_page_url":"https://doi.org/10.1155/2009/398403","pdf_url":"https://downloads.hindawi.com/journals/js/2009/398403.pdf","source":{"id":"https://openalex.org/S96783963","display_name":"Journal of Sensors","issn_l":"1687-725X","issn":["1687-725X","1687-7268"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310319869","host_organization_name":"Hindawi Publishing Corporation","host_organization_lineage":["https://openalex.org/P4310319869"],"host_organization_lineage_names":["Hindawi Publishing Corporation"],"type":"journal"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Journal of Sensors","raw_type":"journal-article"},{"id":"pmh:oai:doaj.org/article:ca48b8c27c094447947229c7c557337d","is_oa":true,"landing_page_url":"https://doaj.org/article/ca48b8c27c094447947229c7c557337d","pdf_url":null,"source":{"id":"https://openalex.org/S4306401280","display_name":"DOAJ (DOAJ: Directory of Open Access Journals)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":null,"host_organization_name":null,"host_organization_lineage":[],"host_organization_lineage_names":[],"type":"repository"},"license":"cc-by-sa","license_id":"https://openalex.org/licenses/cc-by-sa","version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"Journal of Sensors, Vol 2009 (2009)","raw_type":"article"}],"best_oa_location":{"id":"doi:10.1155/2009/398403","is_oa":true,"landing_page_url":"https://doi.org/10.1155/2009/398403","pdf_url":"https://downloads.hindawi.com/journals/js/2009/398403.pdf","source":{"id":"https://openalex.org/S96783963","display_name":"Journal of Sensors","issn_l":"1687-725X","issn":["1687-725X","1687-7268"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310319869","host_organization_name":"Hindawi Publishing Corporation","host_organization_lineage":["https://openalex.org/P4310319869"],"host_organization_lineage_names":["Hindawi Publishing Corporation"],"type":"journal"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Journal of Sensors","raw_type":"journal-article"},"sustainable_development_goals":[{"id":"https://metadata.un.org/sdg/7","display_name":"Affordable and clean energy","score":0.6000000238418579}],"awards":[],"funders":[],"has_content":{"pdf":true,"grobid_xml":true},"content_urls":{"pdf":"https://content.openalex.org/works/W1975897256.pdf","grobid_xml":"https://content.openalex.org/works/W1975897256.grobid-xml"},"referenced_works_count":34,"referenced_works":["https://openalex.org/W214883591","https://openalex.org/W1837087272","https://openalex.org/W1966392366","https://openalex.org/W1985017516","https://openalex.org/W1988211919","https://openalex.org/W1994221117","https://openalex.org/W1997683183","https://openalex.org/W1998638369","https://openalex.org/W2003234219","https://openalex.org/W2010891465","https://openalex.org/W2017615234","https://openalex.org/W2020695138","https://openalex.org/W2028461437","https://openalex.org/W2029555209","https://openalex.org/W2032059245","https://openalex.org/W2034769746","https://openalex.org/W2035173153","https://openalex.org/W2037556129","https://openalex.org/W2039985671","https://openalex.org/W2041651106","https://openalex.org/W2041654984","https://openalex.org/W2054853842","https://openalex.org/W2067165880","https://openalex.org/W2068407807","https://openalex.org/W2073720281","https://openalex.org/W2081496248","https://openalex.org/W2085223778","https://openalex.org/W2104515484","https://openalex.org/W2123888208","https://openalex.org/W2129190262","https://openalex.org/W2132905138","https://openalex.org/W2133151341","https://openalex.org/W2140441679","https://openalex.org/W4211105962"],"related_works":["https://openalex.org/W2320243538","https://openalex.org/W4385063203","https://openalex.org/W2094288906","https://openalex.org/W1965175117","https://openalex.org/W4378716885","https://openalex.org/W2329184717","https://openalex.org/W2294805326","https://openalex.org/W2364728108","https://openalex.org/W1981223975","https://openalex.org/W2088849221"],"abstract_inverted_index":{"In":[0],"this":[1],"work":[2],"we":[3],"described":[4],"an":[5],"optical":[6],"fibre":[7,93],"sensing":[8,28,49,94],"system":[9,82],"for":[10,33,72],"detecting":[11],"low":[12,76],"levels":[13,77],"of":[14,18,75,78],"methane.":[15,79],"The":[16,51],"properties":[17],"hollow\u2010core":[19],"photonic":[20,91],"crystal":[21,92],"fibres":[22],"are":[23],"explored":[24],"to":[25,86],"have":[26],"a":[27,63],"head":[29],"with":[30,69],"favourable":[31],"characteristics":[32],"gas":[34,44],"sensing,":[35],"particularly":[36],"in":[37,47],"what":[38],"concerns":[39],"intrinsic":[40],"readout":[41],"sensitivity":[42],"and":[43,62],"diffusion":[45],"time":[46],"the":[48,57,84],"structure.":[50],"sensor":[52],"interrogation":[53],"was":[54,67],"performed":[55],"applying":[56],"Wavelength":[58],"Modulation":[59],"Spectroscopy":[60],"technique,":[61],"portable":[64,81],"measurement":[65],"unit":[66],"developed":[68],"performance":[70],"suitable":[71],"remote":[73,90],"detection":[74],"This":[80],"has":[83],"capacity":[85],"simultaneously":[87],"interrogate":[88],"four":[89],"heads.":[95]},"counts_by_year":[{"year":2026,"cited_by_count":1},{"year":2025,"cited_by_count":3},{"year":2024,"cited_by_count":2},{"year":2023,"cited_by_count":5},{"year":2022,"cited_by_count":2},{"year":2021,"cited_by_count":4},{"year":2020,"cited_by_count":7},{"year":2019,"cited_by_count":5},{"year":2018,"cited_by_count":5},{"year":2017,"cited_by_count":3},{"year":2016,"cited_by_count":3},{"year":2015,"cited_by_count":1},{"year":2013,"cited_by_count":3},{"year":2012,"cited_by_count":2}],"updated_date":"2026-05-06T08:25:59.206177","created_date":"2025-10-10T00:00:00"}