Active Mid-Wave to Long-Wave Supercontinuum FTIR Sensor for Standoff Chemical Detection
| Autor: | Robert Bedford, Ricky Gibson, Ramon A. Martinez, Michael J. Freeman, Agustin I. Ifarraguerri, Leland Pierce, Christian Noah Peter, Kaiwen Guo, Lukasz Maksymiuk, Tianqu Zhai, Mohammed N. Islam, Jennifer M. Reed, Brian A. Gorin, Fred L. Terry |
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| Rok vydání: | 2019 |
| Předmět: |
Brightness
Materials science Spectrometer business.industry Scattering Infrared 02 engineering and technology Atomic and Molecular Physics and Optics Light scattering Supercontinuum symbols.namesake 020210 optoelectronics & photonics Optics Fourier transform 0202 electrical engineering electronic engineering information engineering symbols Fourier transform infrared spectroscopy business |
| Zdroj: | Journal of Lightwave Technology. 37:3626-3636 |
| ISSN: | 1558-2213 0733-8724 |
| DOI: | 10.1109/jlt.2019.2918532 |
| Popis: | We demonstrate a prototype mid-wave to long-wave infrared supercontinuum, Fourier transform sensor capable of chemical detection and identification at 3.6 m. The system utilizes a 150 mW supercontinuum source with a continuous spectrum from 1.6–11 μ m and an M $^2$ $\lambda {}$ μ m, to provide high brightness at the target. We measure scattering spectra from powder particles on soda-lime glass down to a concentration of 7.4 μ g/cm $^2$ and show that they match theoretical spectra simulated via a Bobbert–Vlieger model. Unlike diffuse scattering measurements performed on commercial Fourier transform infrared spectrometers, this standoff sensor collects a numerical aperture of 0.0375 and received powers are four orders of magnitude lower than probe powers. |
| Databáze: | OpenAIRE |
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