Field-portable AOTF-based monitor technology for environmental sensing

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FieldPortable65.pdf (1.34 MB)

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https://www.spiedigitallibrary.org/conference-proceedings-of-spie/4577/0000/Field-portable-AOTF-based-monitor-technology-for-environmental-sensing/10.1117/12.455723.full

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https://doi.org/10.1117/12.455723
 http://hdl.handle.net/11603/35969

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UMBC Chemistry & Biochemistry Department

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Author/Creator ORCID

https://orcid.org/0000-0002-5250-8290

Date

2002-02-22

Type of Work

conference papers and proceedings
Text

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Citation of Original Publication

Cullum, Brian M., Joel Mobley, Alan L. Wintenberg, R. A. Maples, David L. Stokes, and Tuan Vo-Dinh. “Field-Portable AOTF-Based Monitor Technology for Environmental Sensing.” In Vibrational Spectroscopy-Based Sensor Systems, 4577. (February 22, 2002):65–75. https://doi.org/10.1117/12.455723.

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THIS WORK WAS WRITTEN AS PART OF ONE OF THE AUTHOR'S OFFICIAL DUTIES AS AN EMPLOYEE OF THE UNITED STATES GOVERNMENT AND IS THEREFORE A WORK OF THE UNITED STATES GOVERNMENT. IN ACCORDANCE WITH 17 U.S.C. 105, NO COPYRIGHT PROTECTION IS AVAILABLE FOR SUCH WORKS UNDER U.S. LAW.
PUBLIC DOMAIN

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Abstract

The development of a field-portable Raman instrument for environmental analyses is described. It is based on the use of a near-infrared frequency-stabilized diode laser for excitation, an acousto-optic tunable filter for wavelength selection, and an avalanche photodiode for detection. Evaluation of this instrument for the monitoring of environmentally important species will be discussed as well as its ability to be operated in room light without significantly increasing the background signal. In addition, we will also describe a baseline removal procedure based on second derivative approach that simplifies and increases the accuracy of the instrument' s automated identification algorithm