{"id":"https://openalex.org/W2883583455","doi":"https://doi.org/10.1088/1555-6611/aad0d8","title":"A continuous-wave quantum cascade laser near 7.5 \u00b5 m combined with 2 f -wavelength modulation spectroscopy for trace monitoring of ambient CH 4 concentrations","display_name":"A continuous-wave quantum cascade laser near 7.5 \u00b5 m combined with 2 f -wavelength modulation spectroscopy for trace monitoring of ambient CH 4 concentrations","publication_year":2018,"publication_date":"2018-07-25","ids":{"openalex":"https://openalex.org/W2883583455","doi":"https://doi.org/10.1088/1555-6611/aad0d8","mag":"2883583455"},"language":"en","primary_location":{"id":"doi:10.1088/1555-6611/aad0d8","doi":"https://doi.org/10.1088/1555-6611/aad0d8","is_oa":true,"landing_page_url":"https://doi.org/10.1088/1555-6611/aad0d8","pdf_url":"https://iopscience.iop.org/article/10.1088/1555-6611/aad0d8/pdf","source":{"id":"https://openalex.org/S170430865","display_name":"Laser Physics","issn_l":"1054-660X","issn":["1054-660X","1555-6611"],"is_oa":false,"is_in_doaj":false,"is_core":true,"listed_in":["cwts-core","dongbi-d","jufo-1","norway-1","poland-40","russia-white-list-2"],"host_organization":"https://openalex.org/P4310320083","host_organization_name":"IOP Publishing","host_organization_lineage":["https://openalex.org/P4310320083","https://openalex.org/P4310311669"],"host_organization_lineage_names":["IOP Publishing","Institute of Physics"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Laser Physics","raw_type":"journal-article"},"volume":null,"type":"article","is_traditional":true,"indexed_in":["crossref"],"open_access":{"is_oa":true,"oa_status":"bronze","oa_url":"https://iopscience.iop.org/article/10.1088/1555-6611/aad0d8/pdf","any_repository_has_fulltext":false},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5062027636","display_name":"Mithun Pal","orcid":"https://orcid.org/0000-0002-9830-2124","observed_orcids":["https://orcid.org/0000-0002-9830-2124"]},"institutions":[{"id":"https://openalex.org/I77430839","display_name":"S.N. Bose National Centre for Basic Sciences","ror":"https://ror.org/00kz6qq24","country_code":"IN","type":"facility","lineage":["https://openalex.org/I77430839"]}],"countries":["IN"],"is_corresponding":false,"raw_author_name":"Mithun Pal","raw_affiliation_strings":["S. N. Bose National Centre for Basic Sciences","Department of Chemical, Biological and Macromolecular Sciences, S. N. Bose National Centre for Basic Sciences, Salt Lake, JD Block, Sector III, Kolkata 700106, India"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"S. N. Bose National Centre for Basic Sciences","institution_ids":["https://openalex.org/I77430839"]},{"raw_affiliation_string":"Department of Chemical, Biological and Macromolecular Sciences, S. N. Bose National Centre for Basic Sciences, Salt Lake, JD Block, Sector III, Kolkata 700106, India","institution_ids":["https://openalex.org/I77430839"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5081631179","display_name":"Abhijit Maity","orcid":"https://orcid.org/0000-0003-1265-0281","observed_orcids":["https://orcid.org/0000-0003-1265-0281"]},"institutions":[{"id":"https://openalex.org/I77430839","display_name":"S.N. Bose National Centre for Basic Sciences","ror":"https://ror.org/00kz6qq24","country_code":"IN","type":"facility","lineage":["https://openalex.org/I77430839"]}],"countries":["IN"],"is_corresponding":false,"raw_author_name":"Abhijit Maity","raw_affiliation_strings":["S. N. Bose National Centre for Basic Sciences","Department of Chemical, Biological and Macromolecular Sciences, S. N. Bose National Centre for Basic Sciences, Salt Lake, JD Block, Sector III, Kolkata 700106, India"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"S. N. Bose National Centre for Basic Sciences","institution_ids":["https://openalex.org/I77430839"]},{"raw_affiliation_string":"Department of Chemical, Biological and Macromolecular Sciences, S. N. Bose National Centre for Basic Sciences, Salt Lake, JD Block, Sector III, Kolkata 700106, India","institution_ids":["https://openalex.org/I77430839"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5054980785","display_name":"Manik Pradhan","orcid":"https://orcid.org/0000-0001-5900-1700","observed_orcids":["https://orcid.org/0000-0001-5900-1700"]},"institutions":[{"id":"https://openalex.org/I77430839","display_name":"S.N. Bose National Centre for Basic Sciences","ror":"https://ror.org/00kz6qq24","country_code":"IN","type":"facility","lineage":["https://openalex.org/I77430839"]}],"countries":["IN"],"is_corresponding":true,"raw_author_name":"Manik Pradhan","raw_affiliation_strings":["S. N. Bose National Centre for Basic Sciences","Technical Research Centre, S. N. Bose National Centre for Basic Sciences, Salt Lake, JD Block, Sector III, Kolkata 700106, India"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"S. N. Bose National Centre for Basic Sciences","institution_ids":["https://openalex.org/I77430839"]},{"raw_affiliation_string":"Technical Research Centre, S. N. Bose National Centre for Basic Sciences, Salt Lake, JD Block, Sector III, Kolkata 700106, India","institution_ids":["https://openalex.org/I77430839"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":1,"corresponding_author_ids":["https://openalex.org/A5054980785"],"corresponding_institution_ids":["https://openalex.org/I77430839"],"apc_list":{"value":3325,"currency":"USD","value_usd":3325},"apc_paid":null,"fwci":0.7078,"has_fulltext":true,"cited_by_count":13,"citation_normalized_percentile":{"value":0.57231279,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":87,"max":97},"biblio":{"volume":"28","issue":"10","first_page":"105702","last_page":"105702"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T11111","display_name":"Spectroscopy and Laser Applications","score":1.0,"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":1.0,"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/T12760","display_name":"Laser Design and Applications","score":0.0,"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/T11324","display_name":"Spectroscopy Techniques in Biomedical and Chemical Research","score":0.0,"subfield":{"id":"https://openalex.org/subfields/1304","display_name":"Biophysics"},"field":{"id":"https://openalex.org/fields/13","display_name":"Biochemistry, Genetics and Molecular Biology"},"domain":{"id":"https://openalex.org/domains/1","display_name":"Life Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/quantum-cascade-laser","display_name":"quantum cascade lasers","score":0.8090000152587891},{"id":"https://openalex.org/keywords/wavelength-modulation-spectroscopy","display_name":"wavelength modulation spectroscopy","score":0.8659999966621399},{"id":"https://openalex.org/keywords/methane-detection","display_name":"methane detection","score":0.890999972820282},{"id":"https://openalex.org/keywords/trace-gas-monitoring","display_name":"trace gas monitoring","score":0.6970000267028809},{"id":"https://openalex.org/keywords/mid-infrared-absorption-spectroscopy","display_name":"mid-infrared absorption spectroscopy","score":0.7720000147819519},{"id":"https://openalex.org/keywords/portable-gas-sensor","display_name":"portable gas sensor","score":0.6769999861717224},{"id":"https://openalex.org/keywords/anthropogenic-methane-sources","display_name":"anthropogenic methane sources","score":0.7120000123977661}],"concepts":[{"id":"https://openalex.org/C2776957298","wikidata":"https://www.wikidata.org/wiki/Q1407411","display_name":"Quantum cascade laser","level":3,"score":0.8949629664421082},{"id":"https://openalex.org/C130047971","wikidata":"https://www.wikidata.org/wiki/Q289382","display_name":"Trace gas","level":2,"score":0.7385331988334656},{"id":"https://openalex.org/C99568719","wikidata":"https://www.wikidata.org/wiki/Q1129003","display_name":"Continuous wave","level":3,"score":0.647004246711731},{"id":"https://openalex.org/C520434653","wikidata":"https://www.wikidata.org/wiki/Q38867","display_name":"Laser","level":2,"score":0.6303078532218933},{"id":"https://openalex.org/C192562407","wikidata":"https://www.wikidata.org/wiki/Q228736","display_name":"Materials science","level":0,"score":0.5259875655174255},{"id":"https://openalex.org/C32891209","wikidata":"https://www.wikidata.org/wiki/Q483666","display_name":"Spectroscopy","level":2,"score":0.5135141015052795},{"id":"https://openalex.org/C6260449","wikidata":"https://www.wikidata.org/wiki/Q41364","display_name":"Wavelength","level":2,"score":0.5054330825805664},{"id":"https://openalex.org/C34146451","wikidata":"https://www.wikidata.org/wiki/Q5048094","display_name":"Cascade","level":2,"score":0.4927718937397003},{"id":"https://openalex.org/C120665830","wikidata":"https://www.wikidata.org/wiki/Q14620","display_name":"Optics","level":1,"score":0.47649234533309937},{"id":"https://openalex.org/C49040817","wikidata":"https://www.wikidata.org/wiki/Q193091","display_name":"Optoelectronics","level":1,"score":0.45007777214050293},{"id":"https://openalex.org/C96566525","wikidata":"https://www.wikidata.org/wiki/Q7805282","display_name":"Time delay and integration","level":2,"score":0.44057878851890564},{"id":"https://openalex.org/C32022120","wikidata":"https://www.wikidata.org/wiki/Q797225","display_name":"Interference (communication)","level":3,"score":0.43570899963378906},{"id":"https://openalex.org/C119128265","wikidata":"https://www.wikidata.org/wiki/Q900165","display_name":"Detection limit","level":2,"score":0.41986700892448425},{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.2633543908596039},{"id":"https://openalex.org/C185592680","wikidata":"https://www.wikidata.org/wiki/Q2329","display_name":"Chemistry","level":0,"score":0.14587441086769104},{"id":"https://openalex.org/C76155785","wikidata":"https://www.wikidata.org/wiki/Q418","display_name":"Telecommunications","level":1,"score":0.0972474217414856},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.08490914106369019},{"id":"https://openalex.org/C127162648","wikidata":"https://www.wikidata.org/wiki/Q16858953","display_name":"Channel (broadcasting)","level":2,"score":0.0},{"id":"https://openalex.org/C153294291","wikidata":"https://www.wikidata.org/wiki/Q25261","display_name":"Meteorology","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},{"id":"https://openalex.org/C43617362","wikidata":"https://www.wikidata.org/wiki/Q170050","display_name":"Chromatography","level":1,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1088/1555-6611/aad0d8","doi":"https://doi.org/10.1088/1555-6611/aad0d8","is_oa":true,"landing_page_url":"https://doi.org/10.1088/1555-6611/aad0d8","pdf_url":"https://iopscience.iop.org/article/10.1088/1555-6611/aad0d8/pdf","source":{"id":"https://openalex.org/S170430865","display_name":"Laser Physics","issn_l":"1054-660X","issn":["1054-660X","1555-6611"],"is_oa":false,"is_in_doaj":false,"is_core":true,"listed_in":["cwts-core","dongbi-d","jufo-1","norway-1","poland-40","russia-white-list-2"],"host_organization":"https://openalex.org/P4310320083","host_organization_name":"IOP Publishing","host_organization_lineage":["https://openalex.org/P4310320083","https://openalex.org/P4310311669"],"host_organization_lineage_names":["IOP Publishing","Institute of Physics"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Laser Physics","raw_type":"journal-article"}],"best_oa_location":{"id":"doi:10.1088/1555-6611/aad0d8","doi":"https://doi.org/10.1088/1555-6611/aad0d8","is_oa":true,"landing_page_url":"https://doi.org/10.1088/1555-6611/aad0d8","pdf_url":"https://iopscience.iop.org/article/10.1088/1555-6611/aad0d8/pdf","source":{"id":"https://openalex.org/S170430865","display_name":"Laser Physics","issn_l":"1054-660X","issn":["1054-660X","1555-6611"],"is_oa":false,"is_in_doaj":false,"is_core":true,"listed_in":["cwts-core","dongbi-d","jufo-1","norway-1","poland-40","russia-white-list-2"],"host_organization":"https://openalex.org/P4310320083","host_organization_name":"IOP Publishing","host_organization_lineage":["https://openalex.org/P4310320083","https://openalex.org/P4310311669"],"host_organization_lineage_names":["IOP Publishing","Institute of Physics"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Laser Physics","raw_type":"journal-article"},"sustainable_development_goals":[],"study_designs":[],"awards":[{"id":"https://openalex.org/G1312412445","display_name":null,"funder_award_id":"MoES/16/26/12-RDEAS","funder_id":"https://openalex.org/F4320321026","funder_display_name":"Ministry of Earth Sciences"}],"funders":[{"id":"https://openalex.org/F4320320719","display_name":"Department of Science and Technology, Ministry of Science and Technology, India","ror":"https://ror.org/0101xrq71"},{"id":"https://openalex.org/F4320321026","display_name":"Ministry of Earth Sciences","ror":"https://ror.org/013cf5k59"},{"id":"https://openalex.org/F4320334771","display_name":"Science and Engineering Research Board","ror":"https://ror.org/03ffdsr55"}],"has_content":{"pdf":true,"grobid_xml":true},"content_urls":{"pdf":"https://content.openalex.org/works/W2883583455.pdf","grobid_xml":"https://content.openalex.org/works/W2883583455.grobid-xml"},"referenced_works_count":18,"referenced_works":["https://openalex.org/W1501230089","https://openalex.org/W1999487428","https://openalex.org/W2001653783","https://openalex.org/W2012206772","https://openalex.org/W2035545289","https://openalex.org/W2046926923","https://openalex.org/W2059649853","https://openalex.org/W2087470187","https://openalex.org/W2089824305","https://openalex.org/W2092559364","https://openalex.org/W2268004228","https://openalex.org/W2346791972","https://openalex.org/W2470484258","https://openalex.org/W2471582609","https://openalex.org/W2603761231","https://openalex.org/W2754367909","https://openalex.org/W2788849412","https://openalex.org/W4206050372"],"related_works":["https://openalex.org/W2258086622","https://openalex.org/W7034189805","https://openalex.org/W1982029306","https://openalex.org/W2791199280","https://openalex.org/W2751934823","https://openalex.org/W2090007925","https://openalex.org/W3024159239","https://openalex.org/W2461372728","https://openalex.org/W4282824302","https://openalex.org/W2024505504"],"abstract_inverted_index":{"Abstract":[0],"We":[1,34],"report":[2],"a":[3,77,86,151],"room-temperature":[4],"continuous-wave":[5],"(cw)":[6],"mode-hop-free":[7],"(MHF)":[8],"external-cavity":[9],"quantum":[10],"cascade":[11],"laser":[12],"(EC-QCL)":[13],"based":[14],"mid-infrared":[15],"methane":[16],"(CH":[17],"4":[18,52,61,67,126],")":[19],"sensor":[20,156],"operating":[21],"between":[22],"7.5":[23],"and":[24,153,169],"8":[25],"\u00b5":[26],"m":[27,93],"in":[28,58,134],"the":[29,36,59,111,129,135,141,148,172,176],"mid-IR":[30],"molecular":[31],"fingerprint":[32],"region.":[33],"utilized":[35],"2":[37,112],"f":[38],"-wavelength":[39],"modulation":[40],"spectroscopy":[41],"(2":[42],"f-":[43,113],"WMS)":[44],"for":[45,94,120,157],"high":[46,167],"sensitive":[47],"monitoring":[48,122,160],"of":[49,65,81,91,98,123,150,161,175],"atmospheric":[50],"CH":[51,66,125],".":[53],"The":[54,101],"strongest":[55],"interference-free":[56],"absorption-line":[57],"\u03bd":[60],"fundamental":[62],"vibrational":[63],"band":[64],"centred":[68],"at":[69,128],"1327.072":[70],"cm":[71],"\u22121":[72],"was":[73,117],"probed":[74],"to":[75,147],"achieve":[76],"minimum":[78],"detection":[79,115],"limit":[80],"11":[82],"parts-per-billion":[83],"(ppb)":[84],"within":[85,171],"relatively":[87],"small":[88],"optical":[89],"pathlength":[90],"1.5":[92],"an":[95],"integration":[96],"time":[97],"272":[99],"s.":[100],"current":[102],"cw":[103],"EC-QCL":[104],"with":[105,166],"MHF":[106],"frequency":[107],"tuning":[108,173],"capability":[109],"exploiting":[110],"WMS":[114],"strategy":[116],"subsequently":[118],"employed":[119],"routine":[121,159],"trace":[124,164],"levels":[127],"different":[130],"anthropogenic":[131],"sources":[132],"present":[133,142],"environment.":[136],"Our":[137],"findings":[138],"suggest":[139],"that":[140],"QCL-based":[143],"system":[144],"could":[145],"lead":[146],"realization":[149],"compact":[152],"field-deployable":[154],"portable":[155],"real-time":[158],"several":[162],"other":[163],"gases":[165],"sensitivity":[168],"specificity":[170],"range":[174],"laser.":[177]},"counts_by_year":[{"year":2026,"cited_by_count":1},{"year":2023,"cited_by_count":2},{"year":2022,"cited_by_count":3},{"year":2021,"cited_by_count":1},{"year":2020,"cited_by_count":4},{"year":2019,"cited_by_count":2}],"updated_date":"2026-08-21T09:56:20.448147","created_date":"2018-08-03T00:00:00"}
