Pulsed quantum cascade laser-based CRDS substance detection: Real-Time detection of TNT

C. C. Harb; T. K. Boyson; A. G. Kallapur; I. R. Petersen; M. E. Calzada; T. G. Spence; K. P. Kirkbride; D. S. Moore

doi:10.1364/OE.20.015489

Pulsed quantum cascade laser-based CRDS substance detection: Real-Time detection of TNT

C. C. Harb^*, T. K. Boyson, A. G. Kallapur, I. R. Petersen, M. E. Calzada, T. G. Spence, K. P. Kirkbride, D. S. Moore

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

24 Citations (Scopus)

Abstract

This paper presents experimental results from a pulsed quantum cascade laser based cavity ringdown spectrometer used as a high-Throughput detection system. The results were obtained from an optical cavity with 99.8% input and output coupling mirrors that was rapidly swept (0.2s to 7s sweep times) between 1582.25 cm-1 (6.3201μm) and 1697.00 cm-1 (5.8928μm ). The spectrometer was able to monitor gas species over the pressure range 585 torr to 1μtorr, and the analysis involves a new digital data processing system that optimises the processing speed and minimises the data storage requirements. In this approach we show that is it not necessary to make direct measurements of the ringdown time of the cavity to obtain the system dynamics. Furthermore, we show that correct data processing is crucial for the ultimate implementation of a wideband IR spectrometer that covers a range similar to that of commercial Fourier transform infrared instruments.

Original language	English
Pages (from-to)	15489-15502
Number of pages	14
Journal	Optics Express
Volume	20
Issue number	14
DOIs	https://doi.org/10.1364/OE.20.015489
Publication status	Published - 2 Jul 2012
Externally published	Yes

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title = "Pulsed quantum cascade laser-based CRDS substance detection: Real-Time detection of TNT",

abstract = "This paper presents experimental results from a pulsed quantum cascade laser based cavity ringdown spectrometer used as a high-Throughput detection system. The results were obtained from an optical cavity with 99.8% input and output coupling mirrors that was rapidly swept (0.2s to 7s sweep times) between 1582.25 cm-1 (6.3201μm) and 1697.00 cm-1 (5.8928μm ). The spectrometer was able to monitor gas species over the pressure range 585 torr to 1μtorr, and the analysis involves a new digital data processing system that optimises the processing speed and minimises the data storage requirements. In this approach we show that is it not necessary to make direct measurements of the ringdown time of the cavity to obtain the system dynamics. Furthermore, we show that correct data processing is crucial for the ultimate implementation of a wideband IR spectrometer that covers a range similar to that of commercial Fourier transform infrared instruments.",

author = "Harb, {C. C.} and Boyson, {T. K.} and Kallapur, {A. G.} and Petersen, {I. R.} and Calzada, {M. E.} and Spence, {T. G.} and Kirkbride, {K. P.} and Moore, {D. S.}",

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T2 - Real-Time detection of TNT

AU - Harb, C. C.

AU - Boyson, T. K.

AU - Kallapur, A. G.

AU - Petersen, I. R.

AU - Calzada, M. E.

AU - Spence, T. G.

AU - Kirkbride, K. P.

AU - Moore, D. S.

PY - 2012/7/2

Y1 - 2012/7/2

N2 - This paper presents experimental results from a pulsed quantum cascade laser based cavity ringdown spectrometer used as a high-Throughput detection system. The results were obtained from an optical cavity with 99.8% input and output coupling mirrors that was rapidly swept (0.2s to 7s sweep times) between 1582.25 cm-1 (6.3201μm) and 1697.00 cm-1 (5.8928μm ). The spectrometer was able to monitor gas species over the pressure range 585 torr to 1μtorr, and the analysis involves a new digital data processing system that optimises the processing speed and minimises the data storage requirements. In this approach we show that is it not necessary to make direct measurements of the ringdown time of the cavity to obtain the system dynamics. Furthermore, we show that correct data processing is crucial for the ultimate implementation of a wideband IR spectrometer that covers a range similar to that of commercial Fourier transform infrared instruments.

AB - This paper presents experimental results from a pulsed quantum cascade laser based cavity ringdown spectrometer used as a high-Throughput detection system. The results were obtained from an optical cavity with 99.8% input and output coupling mirrors that was rapidly swept (0.2s to 7s sweep times) between 1582.25 cm-1 (6.3201μm) and 1697.00 cm-1 (5.8928μm ). The spectrometer was able to monitor gas species over the pressure range 585 torr to 1μtorr, and the analysis involves a new digital data processing system that optimises the processing speed and minimises the data storage requirements. In this approach we show that is it not necessary to make direct measurements of the ringdown time of the cavity to obtain the system dynamics. Furthermore, we show that correct data processing is crucial for the ultimate implementation of a wideband IR spectrometer that covers a range similar to that of commercial Fourier transform infrared instruments.

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IS - 14

ER -

Pulsed quantum cascade laser-based CRDS substance detection: Real-Time detection of TNT

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