OSA's Digital Library

Applied Spectroscopy

Applied Spectroscopy

| PUBLISHED BY SAS — AVAILABLE FROM SAS AND OSA

  • Vol. 66, Iss. 8 — Aug. 1, 2012
  • pp: 875–881

Depth Profiling for the Identification of Unknown Substances and Concealed Content at Remote Distances Using Time-Resolved Stand-Off Raman Spectroscopy

Bernhard Zachhuber, Christoph Gasser, Georg Ramer, Engelene t. H. Chrysostom, and Bernhard Lendl

Applied Spectroscopy, Vol. 66, Issue 8, pp. 875-881 (2012)


View Full Text Article

Acrobat PDF (367 KB)





Browse Journals / Lookup Meetings

Browse by Journal and Year


   


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools

Share
Citations
  • Export Citation/Save Click for help

Abstract

Time-resolved stand-off Raman spectroscopy was used to determine both the position and identity of substances relative to each other at remote distances (up to tens of meters). Spectral information of three xylene isomers, toluene, and sodium chlorate was obtained at a distance of 12 m from the setup. Pairs and triplets of these samples were placed at varying distances (10-60 cm) relative to each other. Via the photon time of flight the distance between the individual samples was determined to an accuracy of 7% (corresponding to a few cm) of the physically measured distance. Furthermore, at a distance of 40 m, time-resolved Raman depth profiling was used to detect sodium chlorate in a white plastic container that was non-transparent to the human eye. The combination of the ranging capabilities of Raman LIDAR (sample location usually determined using prior knowledge of the analyte of interest) with stand-off Raman spectroscopy (analyte detection at remote distances) provides the capability for depth profile identification of unknown substances and analysis of concealed content in distant objects. To achieve these results, a 532 nm laser with a pulse length of 4.4 ns was synchronized to an intensified charge-coupled device camera with a minimum gate width of 500 ps. For automated data analysis a multivariate curve resolution algorithm was employed.

Citation
Bernhard Zachhuber, Christoph Gasser, Georg Ramer, Engelene t. H. Chrysostom, and Bernhard Lendl, "Depth Profiling for the Identification of Unknown Substances and Concealed Content at Remote Distances Using Time-Resolved Stand-Off Raman Spectroscopy," Appl. Spectrosc. 66, 875-881 (2012)
http://www.opticsinfobase.org/as/abstract.cfm?URI=as-66-8-875

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

« Previous Article  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited