High-sensitivity detection of trace gases using dynamic photoacoustic spectroscopy
Lincoln Laboratory of Massachusetts Institute of Technology has developed a technique known as dynamic photoacoustic spectroscopy (DPAS) that could enable remote detection of trace gases via a field-portable laser-based system. A fielded DPAS system has the potential to enable rapid, early warning o...
| Main Authors: | , , , |
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| Other Authors: | |
| Format: | Article |
| Language: | en_US |
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SPIE
2013
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| Online Access: | http://hdl.handle.net/1721.1/83233 |
| _version_ | 1826205917757046784 |
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| author | Wynn, Charles M. Palmacci, Stephen Clark, Michelle L. Kunz, Roderick R. |
| author2 | Lincoln Laboratory |
| author_facet | Lincoln Laboratory Wynn, Charles M. Palmacci, Stephen Clark, Michelle L. Kunz, Roderick R. |
| author_sort | Wynn, Charles M. |
| collection | MIT |
| description | Lincoln Laboratory of Massachusetts Institute of Technology has developed a technique known as dynamic photoacoustic spectroscopy (DPAS) that could enable remote detection of trace gases via a field-portable laser-based system. A fielded DPAS system has the potential to enable rapid, early warning of airborne chemical threats. DPAS is a new form of photoacoustic spectroscopy that relies on a laser beam swept at the speed of sound to amplify an otherwise weak photoacoustic signal. We experimentally determine the sensitivity of this technique using trace quantities of SF[subscript 6] gas. A clutter-limited sensitivity of ~100 ppt is estimated for an integration path of 0.43 m. Additionally, detection at ranges over 5 m using two different detection modalities is demonstrated: a parabolic microphone and a laser vibrometer. Its utility in detecting ammonia emanating from solid samples in an ambient environment is also demonstrated. |
| first_indexed | 2024-09-23T13:21:06Z |
| format | Article |
| id | mit-1721.1/83233 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T13:21:06Z |
| publishDate | 2013 |
| publisher | SPIE |
| record_format | dspace |
| spelling | mit-1721.1/832332022-10-01T14:43:08Z High-sensitivity detection of trace gases using dynamic photoacoustic spectroscopy Wynn, Charles M. Palmacci, Stephen Clark, Michelle L. Kunz, Roderick R. Lincoln Laboratory Wynn, Charles M. Clark, Michelle L. Kunz, Roderick R. Palmacci, Stephen Lincoln Laboratory of Massachusetts Institute of Technology has developed a technique known as dynamic photoacoustic spectroscopy (DPAS) that could enable remote detection of trace gases via a field-portable laser-based system. A fielded DPAS system has the potential to enable rapid, early warning of airborne chemical threats. DPAS is a new form of photoacoustic spectroscopy that relies on a laser beam swept at the speed of sound to amplify an otherwise weak photoacoustic signal. We experimentally determine the sensitivity of this technique using trace quantities of SF[subscript 6] gas. A clutter-limited sensitivity of ~100 ppt is estimated for an integration path of 0.43 m. Additionally, detection at ranges over 5 m using two different detection modalities is demonstrated: a parabolic microphone and a laser vibrometer. Its utility in detecting ammonia emanating from solid samples in an ambient environment is also demonstrated. United States. Dept. of the Air Force (Contract FA8721-05-C-0002) 2013-12-23T18:45:47Z 2013-12-23T18:45:47Z 2013-08 2013-06 Article http://purl.org/eprint/type/JournalArticle 0091-3286 http://hdl.handle.net/1721.1/83233 Wynn, Charles M., Stephen Palmacci, Michelle L. Clark, and Roderick R. Kunz. “High-sensitivity detection of trace gases using dynamic photoacoustic spectroscopy.” Optical Engineering 53, no. 2 (February 1, 2014): 021103. en_US http://dx.doi.org/10.1117/1.OE.53.2.021103 Optical Engineering Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf SPIE SPIE |
| spellingShingle | Wynn, Charles M. Palmacci, Stephen Clark, Michelle L. Kunz, Roderick R. High-sensitivity detection of trace gases using dynamic photoacoustic spectroscopy |
| title | High-sensitivity detection of trace gases using dynamic photoacoustic spectroscopy |
| title_full | High-sensitivity detection of trace gases using dynamic photoacoustic spectroscopy |
| title_fullStr | High-sensitivity detection of trace gases using dynamic photoacoustic spectroscopy |
| title_full_unstemmed | High-sensitivity detection of trace gases using dynamic photoacoustic spectroscopy |
| title_short | High-sensitivity detection of trace gases using dynamic photoacoustic spectroscopy |
| title_sort | high sensitivity detection of trace gases using dynamic photoacoustic spectroscopy |
| url | http://hdl.handle.net/1721.1/83233 |
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