{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,12]],"date-time":"2025-10-12T04:37:44Z","timestamp":1760243864090,"version":"build-2065373602"},"reference-count":36,"publisher":"MDPI AG","issue":"1","license":[{"start":{"date-parts":[[2010,1,13]],"date-time":"2010-01-13T00:00:00Z","timestamp":1263340800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/3.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>Multi-spectral laser imaging is a technique that can offer a combination of the laser capability of accurate spectral sensing with the desirable features of passive multispectral imaging. The technique can be used for detection, discrimination, and identification of objects by their spectral signature. This article describes and reviews the development and evaluation of semiconductor multi-spectral laser imaging systems. Although the method is certainly not specific to any laser technology, the use of semiconductor lasers is significant with respect to practicality and affordability. More relevantly, semiconductor lasers have their own characteristics; they offer excellent wavelength diversity but usually with modest power. Thus, system design and engineering issues are analyzed for approaches and trade-offs that can make the best use of semiconductor laser capabilities in multispectral imaging. A few systems were developed and the technique was tested and evaluated on a variety of natural and man-made objects. It was shown capable of high spectral resolution imaging which, unlike non-imaging point sensing, allows detecting and discriminating objects of interest even without a priori spectroscopic knowledge of the targets. Examples include material and chemical discrimination. It was also shown capable of dealing with the complexity of interpreting diffuse scattered spectral images and produced results that could otherwise be ambiguous with conventional imaging. Examples with glucose and spectral imaging of drug pills were discussed. Lastly, the technique was shown with conventional laser spectroscopy such as wavelength modulation spectroscopy to image a gas (CO). These results suggest the versatility and power of multi-spectral laser imaging, which can be practical with the use of semiconductor lasers.<\/jats:p>","DOI":"10.3390\/s100100544","type":"journal-article","created":{"date-parts":[[2010,1,14]],"date-time":"2010-01-14T10:35:50Z","timestamp":1263465350000},"page":"544-583","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["Semiconductor Laser Multi-Spectral Sensing and Imaging"],"prefix":"10.3390","volume":"10","author":[{"given":"Han  Q.","family":"Le","sequence":"first","affiliation":[{"name":"Photonic Device and System Lab, Department of Electrical and Computer Engineering, D2-N318, University of Houston, 4800 Calhoun, Houston, TX 77204-4005, USA"}]},{"given":"Yang","family":"Wang","sequence":"additional","affiliation":[{"name":"Photonic Device and System Lab, Department of Electrical and Computer Engineering, D2-N318, University of Houston, 4800 Calhoun, Houston, TX 77204-4005, USA"},{"name":"Labsphere, Inc. 231 Shaker Street, North Sutton, NH 03260, USA"}]}],"member":"1968","published-online":{"date-parts":[[2010,1,13]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"Salzer, R., and Siesler, H.W. (2009). Infrared and Raman Spectroscopic Imaging, Wiley-VCH.","DOI":"10.1002\/9783527628230"},{"key":"ref_2","unstructured":"Chang, C.I. (2003). Hyperspectral Imaging: Techniques for Spectral Detection and Classification, Springer."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"748","DOI":"10.1002\/cyto.a.20319","article-title":"Multispectral imaging in biology and medicine: Slices of life","volume":"69","author":"Levenson","year":"2006","journal-title":"Cytometry A"},{"key":"ref_4","doi-asserted-by":"crossref","unstructured":"Weitkamp, C. (2005). Lidar\u2014Range-Resolved Optical Remote Sensing of the Atmosphere, Springer.","DOI":"10.1007\/b106786"},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"621802","DOI":"10.1117\/12.669835","article-title":"Overview of chem-bio sensing","volume":"6218","author":"Swim","year":"2006","journal-title":"Proc. SPIE"},{"key":"ref_6","doi-asserted-by":"crossref","unstructured":"Warren, R.E., Vanderbeek, R.G., and Ahl, J.L. (2009). Detection and classification of atmospheric arerosols using multi-wavelength LWIR LIDAR. Proc. SPIE, 7304.","DOI":"10.1117\/12.818694"},{"key":"ref_7","doi-asserted-by":"crossref","unstructured":"Weitkamp, C. (2005). Lidar\u2014Range-Resolved Optical Remote Sensing of the Atmosphere, Springer.","DOI":"10.1007\/b106786"},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"4478","DOI":"10.1063\/1.1599065","article-title":"Development and testing of a frequency-agile optical parametric oscillator system for differential absorption lidar","volume":"74","author":"Weibring","year":"2003","journal-title":"Rev. Sci. Instrum"},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"87","DOI":"10.1117\/12.366422","article-title":"Tunable IR differential absorption lidar for remote sensing of chemicals","volume":"3757","author":"Prasad","year":"1999","journal-title":"Proc. SPIE"},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"395","DOI":"10.1007\/s00340-004-1565-8","article-title":"Multi-component chemical analysis of gas mixtures using a continuously tunable lidar system","volume":"79","author":"Weibring","year":"2004","journal-title":"Appl. Phys. B: Lasers Opt"},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"524","DOI":"10.1364\/AO.41.000524","article-title":"Trace atmospheric SO2 measurement by multiwavelength curve-fitting and wavelength-optimized dual differential absorption lidar","volume":"41","author":"Fujii","year":"2002","journal-title":"Appl. Opt"},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"144","DOI":"10.1117\/12.258150","article-title":"Frequency-agile OPO-based transmitters for multiwavelength DIAL","volume":"2833","author":"Velsko","year":"1996","journal-title":"Proc. SPIE"},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"7429","DOI":"10.1364\/AO.45.007429","article-title":"Retrieval of aerosol properties from combined multiwavelength lidar and sunphotometer measurements","volume":"45","author":"Pahlow","year":"2006","journal-title":"Appl. Opt"},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"3583","DOI":"10.1364\/AO.42.003583","article-title":"Versatile mobile lidar system for environmental monitoring","volume":"42","author":"Weibring","year":"2003","journal-title":"Appl. Opt"},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"4863","DOI":"10.1364\/AO.40.004863","article-title":"Comprehensive particle characterization from three-wavelength raman-lidar observations: case study","volume":"40","author":"Wandinger","year":"2001","journal-title":"Appl. Opt"},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"1469","DOI":"10.1175\/1520-0426(2000)017<1469:SWCAL>2.0.CO;2","article-title":"Scanning 6-wavelength 11-channel aerosol lidar","volume":"17","author":"Althausen","year":"2000","journal-title":"J. Atmos. Oceanic Technol"},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"686","DOI":"10.1143\/JJAP.42.686","article-title":"Determination of vertical distributions of aerosol optical parameters by use of multi-wavelength lidar data","volume":"42","author":"Yabuki","year":"2003","journal-title":"Jpn. J. Appl. Phys"},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"9029","DOI":"10.1364\/OPEX.13.009029","article-title":"Frequency-comb infrared spectrometer for rapid, remote chemical sensing","volume":"13","author":"Schliesser","year":"2005","journal-title":"Opt. Exp"},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"6198","DOI":"10.1364\/AO.45.006198","article-title":"Pulsed Raman fiber laser and multispectral imaging in three dimensions","volume":"45","author":"Andersen","year":"2006","journal-title":"Appl. Opt"},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"8457","DOI":"10.1364\/OE.16.008457","article-title":"Long-path supercontinuum absorption spectroscopy for measurement of atmospheric constituents","volume":"16","author":"Brown","year":"2008","journal-title":"Opt. Exp"},{"key":"ref_21","doi-asserted-by":"crossref","unstructured":"Vodopyanov, K. (2009). Sensing with mid-infrared frequency combs: a novel modality for ultrasensitive detection of hazardous materials. Proc. SPIE, 7304.","DOI":"10.1117\/12.820774"},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"5243","DOI":"10.1364\/OPEX.12.005243","article-title":"Wavelength modulation imaging with tunable mid-infrared semiconductor laser: spectroscopic and geometrical effects","volume":"12","author":"Wang","year":"2004","journal-title":"Opt. Exp"},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"2321","DOI":"10.1117\/1.1497614","article-title":"Short-range remote spectral sensor using mid-infrared semiconductor lasers with orthogonal code-division multiplexing approach","volume":"41","author":"Morbi","year":"2002","journal-title":"Opt. Eng"},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"6572","DOI":"10.1364\/OPEX.13.006572","article-title":"Multi-spectral mid-infrared laser stand-off imaging","volume":"13","author":"Wang","year":"2005","journal-title":"Opt. Exp"},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"179","DOI":"10.1117\/12.578608","article-title":"Concepts for scalable, CDMA-networked, M\/LWIR semiconductor laser standoff chemical detection system","volume":"5617","author":"Wang","year":"2004","journal-title":"Proc. SPIE"},{"key":"ref_26","doi-asserted-by":"crossref","unstructured":"Wang, Y., Hu, B., and Le, H.Q. (2007). Laser multispectral polarimetric diffuse-scatter imaging. Proc. SPIE, 6565.","DOI":"10.1117\/12.719247"},{"key":"ref_27","doi-asserted-by":"crossref","unstructured":"Wang, Y., Wang, Y., and Le, H.Q. (2005). Multi-spectral imaging with mid-infrared semiconductor lasers. Proc. SPIE, 6062.","DOI":"10.1117\/12.643228"},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"224103","DOI":"10.1063\/1.3027461","article-title":"Stand-off detection of trace explosives via resonant infrared photothermal imaging","volume":"93","author":"Furstenberg","year":"2008","journal-title":"Appl. Phys. Lett"},{"key":"ref_29","doi-asserted-by":"crossref","unstructured":"Papantonakis, M.R., Kendziora, C.A., Furstenberg, R., Stepnowski, S.V., Rake, M., Stepnowski, J., and McGill, R.A. (2009). Stand-off detection of trace explosives by infrared photothermal imaging. Proc. SPIE, 7304.","DOI":"10.1117\/12.818752"},{"key":"ref_30","unstructured":"Gillespie, W., and Burd, J. (2007). Private communications."},{"key":"ref_31","unstructured":"Gillespie, W., and Le, H.Q. (2007). Unpublished data."},{"key":"ref_32","doi-asserted-by":"crossref","first-page":"024005","DOI":"10.1117\/1.2714283","article-title":"Mid-infrared laser measurements of aqueous glucose","volume":"12","author":"Guo","year":"2007","journal-title":"J. Biomed. Opt"},{"key":"ref_33","doi-asserted-by":"crossref","first-page":"142","DOI":"10.1117\/12.366447","article-title":"Diode-laser-based lidars: the next generation","volume":"3758","author":"Cooper","year":"1999","journal-title":"Proc. SPIE"},{"key":"ref_34","first-page":"86","article-title":"Standoff gas leak detectors based on tunable diode laser absorption spectroscopy","volume":"6010","author":"Frish","year":"2005","journal-title":"Proc. SPIE"},{"key":"ref_35","doi-asserted-by":"crossref","first-page":"594","DOI":"10.1088\/0957-0233\/11\/6\/302","article-title":"A portable remote methane sensor using a tunable diode laser","volume":"11","author":"Iseki","year":"2000","journal-title":"Meas. Sci. Technol"},{"key":"ref_36","unstructured":"Duda, R.O., Hart, P.E., and Stork, D.G. (2001). Pattern Classification, Wiley-Interscience."}],"container-title":["Sensors"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1424-8220\/10\/1\/544\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T22:01:10Z","timestamp":1760220070000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1424-8220\/10\/1\/544"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2010,1,13]]},"references-count":36,"journal-issue":{"issue":"1","published-online":{"date-parts":[[2010,1]]}},"alternative-id":["s100100544"],"URL":"https:\/\/doi.org\/10.3390\/s100100544","relation":{},"ISSN":["1424-8220"],"issn-type":[{"type":"electronic","value":"1424-8220"}],"subject":[],"published":{"date-parts":[[2010,1,13]]}}}