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Fourier-transform laser spectroscopy.

Kevin L McNesby1, Andrzej W Miziolek

  • 1US Army Research Laboratory, Aberdeen Proving Ground, Maryland 21005-5066, USA. mcnesby@arl.army.mil

Applied Optics
|April 29, 2003
PubMed
Summary

This study introduces microphotonic sensors using Fourier-transform laser spectroscopy (FT-LS) for detecting hydrocarbon fuel vapors like JP-8 and diesel. This novel optical mixing technique offers precise measurement of fuel vapor concentrations.

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Area of Science:

  • Photonics and Spectroscopy
  • Chemical Sensing
  • Fuel Analysis

Background:

  • Microphotonic sensors offer miniaturized solutions for chemical detection.
  • Fourier-transform laser spectroscopy (FT-LS) provides high-resolution spectral analysis.
  • Accurate detection of hydrocarbon fuel vapors is crucial for safety and environmental monitoring.

Purpose of the Study:

  • To develop and demonstrate microphotonic sensors for hydrocarbon fuel vapor detection.
  • To apply FT-LS technology for measuring vapors from JP-8, diesel, and gasoline.
  • To explore the potential of multilaser arrays for enhanced sensing capabilities.

Main Methods:

  • Utilized a two-laser prototype FT-LS sensor.
  • Employed distributed-feedback lasers in the near-infrared (1.3- and 1.7-microm).
  • Investigated an optical mixing technique for vapor concentration measurement.

Main Results:

  • Successfully measured vapor concentrations of JP-8, diesel fuel, and gasoline.
  • Demonstrated the feasibility of using near-infrared FT-LS for fuel vapor analysis.
  • Presented a novel application of optical mixing for middle-distillate fuel vapor detection.

Conclusions:

  • Microphotonic FT-LS sensors are effective for hydrocarbon fuel vapor detection.
  • The demonstrated optical mixing technique is a pioneering method for middle-distillate fuel vapor analysis.
  • Future research directions include the development of multilaser array sensors.

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