{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,11,18]],"date-time":"2025-11-18T09:21:50Z","timestamp":1763457710885,"version":"build-2065373602"},"reference-count":84,"publisher":"MDPI AG","issue":"3","license":[{"start":{"date-parts":[[2018,2,27]],"date-time":"2018-02-27T00:00:00Z","timestamp":1519689600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100008433","name":"Consejer\u00eda de Educaci\u00f3n, Juventud y Deporte, Comunidad de Madrid","doi-asserted-by":"publisher","award":["2016-T1\/AMB-1695"],"award-info":[{"award-number":["2016-T1\/AMB-1695"]}],"id":[{"id":"10.13039\/501100008433","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001659","name":"Deutsche Forschungsgemeinschaft","doi-asserted-by":"publisher","id":[{"id":"10.13039\/501100001659","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>Comprehensive food chain management requires the monitoring of many parameters including temperature, humidity, and multiple gases. The latter is highly challenging because no low-cost technology for the simultaneous chemical analysis of multiple gaseous components currently exists. This contribution proposes the use of cavity enhanced Raman spectroscopy to enable online monitoring of all relevant components using a single laser source. A laboratory scale setup is presented and characterized in detail. Power enhancement of the pump light is achieved in an optical resonator with a Finesse exceeding 2500. A simulation for the light scattering behavior shows the influence of polarization on the spatial distribution of the Raman scattered light. The setup is also used to measure three relevant showcase gases to demonstrate the feasibility of the approach, including carbon dioxide, oxygen and ethene.<\/jats:p>","DOI":"10.3390\/s18030709","type":"journal-article","created":{"date-parts":[[2018,2,27]],"date-time":"2018-02-27T14:18:08Z","timestamp":1519741088000},"page":"709","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":33,"title":["Cavity-Enhanced Raman Spectroscopy for Food Chain Management"],"prefix":"10.3390","volume":"18","author":[{"given":"Vincenz","family":"Sandfort","sequence":"first","affiliation":[{"name":"Laboratory for Gas Sensors, Department of Microsystems Engineering\u2013IMTEK, University of Freiburg, Georges-K\u00f6hler-Allee 102, 79110 Freiburg, Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jens","family":"Goldschmidt","sequence":"additional","affiliation":[{"name":"Laboratory for Gas Sensors, Department of Microsystems Engineering\u2013IMTEK, University of Freiburg, Georges-K\u00f6hler-Allee 102, 79110 Freiburg, Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"J\u00fcrgen","family":"W\u00f6llenstein","sequence":"additional","affiliation":[{"name":"Laboratory for Gas Sensors, Department of Microsystems Engineering\u2013IMTEK, University of Freiburg, Georges-K\u00f6hler-Allee 102, 79110 Freiburg, Germany"},{"name":"Fraunhofer Institute for Physical Measurement Techniques IPM, Heidenhofstra\u00dfe 8, 79110 Freiburg, Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2109-1936","authenticated-orcid":false,"given":"Stefan","family":"Palzer","sequence":"additional","affiliation":[{"name":"Department of Computer Science, Universidad Aut\u00f3noma de Madrid, Francisco Tom\u00e1s y Valiente 11, 28049 Madrid, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2018,2,27]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"1223","DOI":"10.1007\/s13197-011-0583-x","article-title":"Role of internal atmosphere on fruit ripening and storability\u2014A review","volume":"51","author":"Paul","year":"2014","journal-title":"J. Food Sci. Technol."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"259","DOI":"10.1049\/el:20073739","article-title":"Functional antenna integrated with relative humidity sensor using synthesised polyimide for passive RFID sensing","volume":"43","author":"Chang","year":"2007","journal-title":"Electron. Lett."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"26","DOI":"10.1007\/s11694-009-9072-6","article-title":"Application of RFID technologies in the temperature mapping of the pineapple supply chain","volume":"3","author":"Amador","year":"2009","journal-title":"Sens. Instrum. Food Qual. Saf."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"394","DOI":"10.1016\/j.jfoodeng.2009.02.004","article-title":"RFID smart tag for traceability and cold chain monitoring of foods: Demonstration in an intercontinental fresh fish logistic chain","volume":"93","author":"Abad","year":"2009","journal-title":"J. Food Eng."},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"179","DOI":"10.1104\/pp.37.2.179","article-title":"Role of Ethylene in Fruit Ripening","volume":"37","author":"Burg","year":"1962","journal-title":"Plant Physiol."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"1008","DOI":"10.1038\/1341008a0","article-title":"Production of Ethylene by Some Ripening Fruits","volume":"134","author":"Gane","year":"1934","journal-title":"Nature"},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"279","DOI":"10.1016\/S0925-5214(98)00091-X","article-title":"Effect of ethylene on quality of fresh fruits and vegetables","volume":"15","author":"Saltveit","year":"1999","journal-title":"Postharvest Biol. Technol."},{"key":"ref_8","first-page":"486","article-title":"Effect of Reduced O2 and Increased CO2 (Controlled Atmosphere Storage) on the Ripening and Quality of Ethylene Treated Banana Fruit","volume":"3","author":"Ahmad","year":"2001","journal-title":"Int. J. Agric. Biol."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"330","DOI":"10.1016\/j.jfoodeng.2012.10.039","article-title":"Sea transport of bananas in containers\u2014Parameter identification for a temperature model","volume":"115","author":"Jedermann","year":"2013","journal-title":"J. Food Eng."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"2088","DOI":"10.3390\/s100302088","article-title":"Metal oxide gas sensors: Sensitivity and influencing factors","volume":"10","author":"Wang","year":"2010","journal-title":"Sensors"},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"885","DOI":"10.1016\/j.snb.2016.03.022","article-title":"Low-cost gas sensing system for the reliable and precise measurement of methane, carbon dioxide and hydrogen sulfide in natural gas and biomethane","volume":"236","author":"Knobelspies","year":"2016","journal-title":"Sens. Actuators B Chem."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"221","DOI":"10.1016\/S0021-9673(98)00706-7","article-title":"Aspects of the mechanism of the flame ionization detector","volume":"842","author":"Holm","year":"1999","journal-title":"J. Chromatogr. A"},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"73509","DOI":"10.1063\/1.4893736","article-title":"Specific, trace gas induced phase transition in copper(II)oxide for highly selective gas sensing","volume":"105","author":"Kneer","year":"2014","journal-title":"Appl. Phys. Lett."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"625","DOI":"10.1016\/j.snb.2015.08.071","article-title":"New method to selectively determine hydrogen sulfide concentrations using CuO layers","volume":"222","author":"Kneer","year":"2016","journal-title":"Sens. Actuators B Chem."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"57","DOI":"10.1016\/j.snb.2016.01.104","article-title":"Manipulating the gas-surface interaction between copper(II) oxide and mono-nitrogen oxides using temperature","volume":"229","author":"Kneer","year":"2016","journal-title":"Sens. Actuators B Chem."},{"key":"ref_16","doi-asserted-by":"crossref","unstructured":"Ortiz P\u00e9rez, A., Kallfa\u00df-de Frenes, V., Filbert, A., Kneer, J., Bierer, B., Held, P., Klein, P., W\u00f6llenstein, J., Benyoucef, D., and Kallfa\u00df, S. (2016). Odor-Sensing System to Support Social Participation of People Suffering from Incontinence. Sensors, 17.","DOI":"10.3390\/s17010058"},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"331","DOI":"10.1016\/j.snb.2012.12.026","article-title":"Temperature optimization of metal oxide sensor arrays using Mutual Information","volume":"187","author":"Fonollosa","year":"2013","journal-title":"Sens. Actuators B Chem."},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"705","DOI":"10.1021\/cr068121q","article-title":"Electronic nose: Current status and future trends","volume":"108","author":"Rock","year":"2008","journal-title":"Chem. Rev."},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"580","DOI":"10.1016\/j.snb.2013.06.006","article-title":"Non-dispersive infra-red (NDIR) measurement of carbon dioxide at 4.2 \u03bcm in a compact and optically efficient sensor","volume":"186","author":"Hodgkinson","year":"2013","journal-title":"Sens. Actuators B Chem."},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"12729","DOI":"10.3390\/s120912729","article-title":"A One ppm NDIR Methane Gas Sensor with Single Frequency Filter Denoising Algorithm","volume":"12","author":"Zhu","year":"2012","journal-title":"Sensors"},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"2889","DOI":"10.1109\/JSEN.2017.2682638","article-title":"Miniature Low-Cost Carbon Dioxide Sensor for Mobile Devices","volume":"17","author":"Scholz","year":"2017","journal-title":"IEEE Sens. J."},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"546","DOI":"10.1016\/j.snb.2008.12.015","article-title":"Ethylene optical spectrometer for apple ripening monitoring in controlled atmosphere store-houses","volume":"136","author":"Fonollosa","year":"2009","journal-title":"Sens. Actuators B Chem."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"12004","DOI":"10.1088\/0957-0233\/24\/1\/012004","article-title":"Optical gas sensing: A review","volume":"24","author":"Hodgkinson","year":"2013","journal-title":"Meas. Sci. Technol. Meas. Sci. Technol."},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"142","DOI":"10.1364\/OL.6.000142","article-title":"Detection of atomic oxygen by intracavity spectroscopy","volume":"6","author":"Harris","year":"1981","journal-title":"Opt. Lett."},{"key":"ref_25","doi-asserted-by":"crossref","unstructured":"Wartewig, S., Schorn, C., and Bigler, P. (2003). IR and Raman Spectroscopy, Wiley-VCH Verlag GmbH & Co. KGaA.","DOI":"10.1002\/3527601635"},{"key":"ref_26","doi-asserted-by":"crossref","unstructured":"Scholz, L., and Palzer, S. (2016). Photoacoustic-based detector for infrared laser spectroscopy; Photoacoustic-based detector for infrared laser spectroscopy. Cit. Appl. Phys. Lett., 109.","DOI":"10.1063\/1.4959886"},{"key":"ref_27","doi-asserted-by":"crossref","unstructured":"Griffiths, P.R., and de Haseth, J.A. (2007). Fourier Transform Infrared Spectrometry, John Wiley & Sons, Inc.","DOI":"10.1002\/047010631X"},{"key":"ref_28","unstructured":"Gremlich, H.-U. (2008). Infrared and Raman Spectroscopy. Handbook of Analytical Techniques, Wiley-VCH Verlag GmbH."},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"58","DOI":"10.1016\/0165-9936(87)87024-3","article-title":"Gas chromatography-Fourier transform infrared spectroscopy-mass spectrometry. A powerful tool for component identification in complex organic mixtures","volume":"6","author":"Demirgian","year":"1987","journal-title":"TrAC Trends Anal. Chem."},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"1153","DOI":"10.5194\/amt-6-1153-2013","article-title":"Assessment of a multi-species in situ FTIR for precise atmospheric greenhouse gas observations","volume":"6","author":"Hammer","year":"2013","journal-title":"Atmos. Meas. Tech."},{"key":"ref_31","doi-asserted-by":"crossref","unstructured":"Grob, R.L., and Barry, E.F. (2004). Modern Practice of Gas Chromatography, John Wiley & Sons, Inc.. [4th ed.].","DOI":"10.1002\/0471651141"},{"key":"ref_32","unstructured":"Eiceman, G.A. (2006). Instrumentation of Gas Chromatography. Encyclopedia of Analytical Chemistry, John Wiley & Sons, Ltd."},{"key":"ref_33","doi-asserted-by":"crossref","unstructured":"Sparkman, O.D., Penton, Z., and Kitson, F.G. (2011). Gas Chromatography and Mass Spectrometry\u202f: A Practical Guide, Academic Press.","DOI":"10.1016\/B978-0-12-373628-4.00002-2"},{"key":"ref_34","doi-asserted-by":"crossref","first-page":"1287","DOI":"10.1002\/jms.388","article-title":"Analyses of gas composition in vacuum systems by mass spectrometry","volume":"37","author":"Repa","year":"2002","journal-title":"J. Mass Spectrom."},{"key":"ref_35","doi-asserted-by":"crossref","first-page":"1465","DOI":"10.1021\/ac50033a022","article-title":"Isotope-ratio-monitoring gas chromatography-mass spectrometry","volume":"50","author":"Matthews","year":"1978","journal-title":"Anal. Chem."},{"key":"ref_36","doi-asserted-by":"crossref","unstructured":"Zoubir, A. (2012). Raman Imaging, Springer.","DOI":"10.1007\/978-3-642-28252-2"},{"key":"ref_37","doi-asserted-by":"crossref","first-page":"501","DOI":"10.1038\/121501c0","article-title":"A New Type of Secondary Radiation","volume":"121","author":"Raman","year":"1928","journal-title":"Nature"},{"key":"ref_38","doi-asserted-by":"crossref","first-page":"1604","DOI":"10.1364\/JOSA.63.001604","article-title":"Cross section for the Raman effect in molecular nitrogen gas","volume":"63","author":"Hyatt","year":"1973","journal-title":"J. Opt. Soc. Am."},{"key":"ref_39","doi-asserted-by":"crossref","first-page":"20","DOI":"10.1126\/science.169.3940.20","article-title":"Laser Raman Spectroscopy","volume":"169","author":"Mooradian","year":"1970","journal-title":"Science"},{"key":"ref_40","doi-asserted-by":"crossref","unstructured":"Demtr\u00f6der, W. (2013). Laserspektroskopie 2. Experimentelle Techniken, Springer Spektrum. [6th ed.].","DOI":"10.1007\/978-3-642-21447-9"},{"key":"ref_41","doi-asserted-by":"crossref","unstructured":"Larkin, P. (2011). Infrared and Raman Spectroscopy: Principles and Spectral Interpretation, Elsevier.","DOI":"10.1016\/B978-0-12-386984-5.10002-3"},{"key":"ref_42","doi-asserted-by":"crossref","unstructured":"Long, D.A. (2002). The Raman Effect: A Unified Treatment of the Theory of Raman Scattering by Molecules, John Wiley & Sons Ltd.","DOI":"10.1002\/0470845767"},{"key":"ref_43","doi-asserted-by":"crossref","first-page":"1667","DOI":"10.1103\/PhysRevLett.78.1667","article-title":"Single Molecule Detection Using Surface-Enhanced Raman Scattering (SERS)","volume":"78","author":"Kneipp","year":"1997","journal-title":"Phys. Rev. Lett."},{"key":"ref_44","doi-asserted-by":"crossref","first-page":"485","DOI":"10.1002\/jrs.1362","article-title":"Surface-enhanced Raman spectroscopy: A brief retrospective","volume":"36","author":"Moskovits","year":"2005","journal-title":"J. Raman Spectrosc."},{"key":"ref_45","doi-asserted-by":"crossref","first-page":"601","DOI":"10.1146\/annurev.anchem.1.031207.112814","article-title":"Surface-Enhanced Raman Spectroscopy","volume":"1","author":"Stiles","year":"2008","journal-title":"Annu. Rev. Anal. Chem."},{"key":"ref_46","doi-asserted-by":"crossref","first-page":"3904","DOI":"10.1039\/C7CS00155J","article-title":"Plasmon-enhanced spectroscopy of absorption and spontaneous emissions explained using cavity quantum optics","volume":"46","author":"Itoh","year":"2017","journal-title":"Chem. Soc. Rev."},{"key":"ref_47","unstructured":"Schrader, B. (2008). Infrared and Raman Spectroscopy\u202f: Methods and Applications, Wiley-VCH Verlag GmbH."},{"key":"ref_48","doi-asserted-by":"crossref","first-page":"272","DOI":"10.1088\/1464-4266\/5\/3\/312","article-title":"On cavity modification of stimulated Raman scattering","volume":"5","author":"Matsko","year":"2003","journal-title":"J. Opt. B Quantum Semiclassical Opt."},{"key":"ref_49","doi-asserted-by":"crossref","first-page":"989","DOI":"10.1119\/1.1973774","article-title":"The Stimulated Raman Effect","volume":"35","author":"Bloembergen","year":"1967","journal-title":"Am. J. Phys."},{"key":"ref_50","doi-asserted-by":"crossref","first-page":"826","DOI":"10.2514\/3.49358","article-title":"Gas Concentration Measurement by Coherent Raman Anti-Stokes Scattering","volume":"12","author":"Regnier","year":"1974","journal-title":"AIAA J."},{"key":"ref_51","doi-asserted-by":"crossref","first-page":"253","DOI":"10.1366\/000370277774463625","article-title":"A Review of the Theory and Application of Coherent Anti-Stokes Raman Spectroscopy (CARS)","volume":"31","author":"Tolles","year":"1977","journal-title":"Appl. Spectrosc."},{"key":"ref_52","first-page":"731608","article-title":"Raman Sensing of Fuel Gases Using a Reflective Coating Capillary Optical Fiber","volume":"7316","author":"Buric","year":"2009","journal-title":"Fiber Opt. Sensors Appl. VI"},{"key":"ref_53","doi-asserted-by":"crossref","first-page":"163","DOI":"10.1063\/1.88100","article-title":"cw Raman fiber amplifier","volume":"26","author":"Stone","year":"1975","journal-title":"Appl. Phys. Lett."},{"key":"ref_54","doi-asserted-by":"crossref","first-page":"5278","DOI":"10.1021\/ac404162w","article-title":"Fiber-Enhanced Raman Multigas Spectroscopy: A Versatile Tool for Environmental Gas Sensing and Breath Analysis","volume":"86","author":"Hanf","year":"2014","journal-title":"Anal. Chem."},{"key":"ref_55","doi-asserted-by":"crossref","first-page":"982","DOI":"10.1021\/ac503450y","article-title":"Fast and Highly Sensitive Fiber-Enhanced Raman Spectroscopic Monitoring of Molecular H2 and CH4 for Point-of-Care Diagnosis of Malabsorption Disorders in Exhaled Human Breath","volume":"87","author":"Hanf","year":"2015","journal-title":"Anal. Chem."},{"key":"ref_56","doi-asserted-by":"crossref","first-page":"2023","DOI":"10.1039\/C5AN02120K","article-title":"All-in-one: A versatile gas sensor based on fiber enhanced Raman spectroscopy for monitoring postharvest fruit conservation and ripening","volume":"141","author":"Jochum","year":"2016","journal-title":"Analyst"},{"key":"ref_57","doi-asserted-by":"crossref","unstructured":"Sandfort, V., Trabold, B., Abdolvand, A., Bolwien, C., Russell, P., W\u00f6llenstein, J., and Palzer, S. (2017). Monitoring the Wobbe Index of Natural Gas Using Fiber-Enhanced Raman Spectroscopy. Sensors, 17.","DOI":"10.3390\/s17122714"},{"key":"ref_58","doi-asserted-by":"crossref","first-page":"746","DOI":"10.1002\/cite.201500113","article-title":"Neue Methoden der laserbasierten Gasanalytik","volume":"88","author":"Lambrecht","year":"2016","journal-title":"Chemie Ing. Tech."},{"key":"ref_59","doi-asserted-by":"crossref","first-page":"9521","DOI":"10.1364\/AO.55.009521","article-title":"Multipass optical system for a Raman gas spectrometer","volume":"55","author":"Petrov","year":"2016","journal-title":"Appl. Opt."},{"key":"ref_60","doi-asserted-by":"crossref","first-page":"2004","DOI":"10.1364\/AO.16.002004","article-title":"Retroreflecting multipass cell for Raman scattering","volume":"16","author":"Hill","year":"1977","journal-title":"Appl. Opt."},{"key":"ref_61","doi-asserted-by":"crossref","first-page":"708","DOI":"10.1002\/jrs.4711","article-title":"Demonstration of a signal enhanced fast Raman sensor for multi-species gas analyses at a low pressure range for anesthesia monitoring","volume":"46","author":"Krischke","year":"2015","journal-title":"J. Raman Spectrosc."},{"key":"ref_62","doi-asserted-by":"crossref","first-page":"7803","DOI":"10.1021\/acs.analchem.5b01462","article-title":"Cavity-Enhanced Raman Spectroscopy of Natural Gas with Optical Feedback cw-Diode Lasers","volume":"87","author":"Hippler","year":"2015","journal-title":"Anal. Chem."},{"key":"ref_63","doi-asserted-by":"crossref","first-page":"4669","DOI":"10.1039\/c2an35722d","article-title":"Cavity-enhanced Raman spectroscopy with optical feedback cw diode lasers for gas phase analysis and spectroscopy","volume":"137","author":"Salter","year":"2012","journal-title":"Analyst"},{"key":"ref_64","doi-asserted-by":"crossref","first-page":"4473","DOI":"10.1039\/C5AN00402K","article-title":"Online investigation of respiratory quotients in Pinus sylvestris and Picea abies during drought and shading by means of cavity-enhanced Raman multi-gas spectrometry","volume":"140","author":"Hanf","year":"2015","journal-title":"Analyst"},{"key":"ref_65","doi-asserted-by":"crossref","first-page":"311","DOI":"10.1364\/JOSA.58.000311","article-title":"Laser-Excited Rotation\u2013Vibration Raman Scattering in Ultra-Small Gas Samples","volume":"58","author":"Barrett","year":"1968","journal-title":"J. Opt. Soc. Am."},{"key":"ref_66","doi-asserted-by":"crossref","first-page":"553","DOI":"10.1366\/000370272774351813","article-title":"Modification of a Commercial Argon Ion Laser for Enhancement of Gas Phase Raman Scattering","volume":"26","author":"Neely","year":"1972","journal-title":"Appl. Spectrosc."},{"key":"ref_67","doi-asserted-by":"crossref","first-page":"425","DOI":"10.1366\/000370273774333074","article-title":"Intracavity Laser Raman Spectroscopy Using a Commercial Laser","volume":"27","author":"Hickman","year":"1973","journal-title":"Appl. Spectrosc."},{"key":"ref_68","doi-asserted-by":"crossref","first-page":"342","DOI":"10.1007\/s10043-003-0342-y","article-title":"Performance Characteristics of Power Build-Up Cavity for Raman Spectroscopic Measurement","volume":"10","author":"Ohara","year":"2003","journal-title":"Opt. Rev."},{"key":"ref_69","doi-asserted-by":"crossref","first-page":"3193","DOI":"10.1364\/OL.41.003193","article-title":"Cavity-enhanced rotational Raman scattering in gases using a 20 mW near-infrared fiber laser","volume":"41","author":"Friss","year":"2016","journal-title":"Opt. Lett."},{"key":"ref_70","doi-asserted-by":"crossref","first-page":"472","DOI":"10.1364\/OL.25.000472","article-title":"Widely tunable continuous-wave Raman laser in diatomic hydrogen pumped by an external-cavity diode laser","volume":"25","author":"Meng","year":"2000","journal-title":"Opt. Lett."},{"key":"ref_71","doi-asserted-by":"crossref","first-page":"1312","DOI":"10.1109\/PROC.1966.5119","article-title":"Laser beams and resonators","volume":"54","author":"Kogelnik","year":"1966","journal-title":"Proc. IEEE"},{"key":"ref_72","doi-asserted-by":"crossref","first-page":"541","DOI":"10.1016\/0030-4018(95)00146-Y","article-title":"A compact grating-stabilized diode laser system for atomic physics","volume":"117","author":"Ricci","year":"1995","journal-title":"Opt. Commun."},{"key":"ref_73","unstructured":"Saleh, B.E.A. (2007). Fundamentals of Photonics, John Wiley & Sons, Inc.. [2nd ed.]."},{"key":"ref_74","first-page":"17","article-title":"Free Space Optical Channel Characterization and Modeling with Focus on Algeria Weather Conditions","volume":"4","author":"Rouissat","year":"2012","journal-title":"Int. J. Comput. Netw. Inf. Secur."},{"key":"ref_75","doi-asserted-by":"crossref","first-page":"97","DOI":"10.1007\/BF00702605","article-title":"Laser phase and frequency stabilization using an optical resonator","volume":"31","author":"Drever","year":"1983","journal-title":"Appl. Phys. B Photophys. Laser Chem."},{"key":"ref_76","doi-asserted-by":"crossref","first-page":"79","DOI":"10.1119\/1.1286663","article-title":"An introduction to Pound\u2013Drever\u2013Hall laser frequency stabilization","volume":"69","author":"Black","year":"2001","journal-title":"Am. J. Phys."},{"key":"ref_77","first-page":"16","article-title":"Notes on the Pound-Drever-Hall technique","volume":"4","author":"Black","year":"1998","journal-title":"Technology"},{"key":"ref_78","doi-asserted-by":"crossref","first-page":"55006","DOI":"10.1063\/1.4878717","article-title":"Apparatus to characterize gas sensor response under real-world conditions in the lab","volume":"85","author":"Kneer","year":"2014","journal-title":"Rev. Sci. Instrum."},{"key":"ref_79","doi-asserted-by":"crossref","first-page":"85408","DOI":"10.1088\/0957-0233\/19\/8\/085408","article-title":"Design and characterization of a Raman-scattering-based sensor system for temporally resolved gas analysis and its application in a gas turbine power plant","volume":"19","author":"Kiefer","year":"2008","journal-title":"Meas. Sci. Technol."},{"key":"ref_80","doi-asserted-by":"crossref","unstructured":"Dieing, T., Hollricher, O., and Toporski, J. (2011). Confocal Raman Microscopy, Springer.","DOI":"10.1007\/978-3-642-12522-5"},{"key":"ref_81","doi-asserted-by":"crossref","unstructured":"Demtr\u00f6der, W. (2009). Experimentalphysik 2, Springer Berlin Heidelberg. Springer-Lehrbuch.","DOI":"10.1007\/978-3-642-03911-9"},{"key":"ref_82","unstructured":"Steck, D.A. (2017, December 04). Rubidium 87 D Line Data. Available online: http:\/\/steck.us\/alkalidata."},{"key":"ref_83","unstructured":"Steck, D.A. (2017, December 04). Rubidium 85 D Line Data. Available online: http:\/\/steck.us\/alkalidata."},{"key":"ref_84","doi-asserted-by":"crossref","unstructured":"McCreery, R.L. (2000). Raman Spectroscopy for Chemical Analysis, John Wiley & Sons.","DOI":"10.1002\/0471721646"}],"container-title":["Sensors"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1424-8220\/18\/3\/709\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T14:56:41Z","timestamp":1760194601000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1424-8220\/18\/3\/709"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2018,2,27]]},"references-count":84,"journal-issue":{"issue":"3","published-online":{"date-parts":[[2018,3]]}},"alternative-id":["s18030709"],"URL":"https:\/\/doi.org\/10.3390\/s18030709","relation":{},"ISSN":["1424-8220"],"issn-type":[{"type":"electronic","value":"1424-8220"}],"subject":[],"published":{"date-parts":[[2018,2,27]]}}}