Monitoring of ethylene by a pulsed quantum cascade laser

Damien Weidmann; Anatoliy A. Kosterev; Chad Roller; Robert F. Curl; Matthew P. Fraser; Frank K. Tittel

doi:10.1364/AO.43.003329

Monitoring of ethylene by a pulsed quantum cascade laser

Damien Weidmann, Anatoliy A. Kosterev, Chad Roller, Robert F. Curl, Matthew P. Fraser, Frank K. Tittel

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

58 Scopus citations

Abstract

We report on the development and performance of a gas sensor based on a quantum cascade laser operating at a wavelength of ∼10 μm to measure ethylene (C₂H₄) concentrations by use of a rotational component of the fundamental νv₇ band. The laser is thermoelectrically cooled and operates in a pulsed mode. The influence of pulse-to-pulse fluctuations is minimized by use of a reference beam and a single detector with time discriminating electronics. Gas absorption is recorded in a 100-m optical path- length astigmatic Harriott cell. With a 10-kHz pulse repetition rate and an 80-s total acquisition time, a noise equivalent sensitivity of 30 parts per billion has been demonstrated. The sensor has been applied to monitor C₂H₄ in vehicle exhaust as well as in air collected in a high-traffic urban tunnel.

Original language	English (US)
Pages (from-to)	3329-3334
Number of pages	6
Journal	Applied Optics
Volume	43
Issue number	16
DOIs	https://doi.org/10.1364/AO.43.003329
State	Published - Jun 1 2004
Externally published	Yes

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics
Engineering (miscellaneous)
Electrical and Electronic Engineering

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10.1364/AO.43.003329

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abstract = "We report on the development and performance of a gas sensor based on a quantum cascade laser operating at a wavelength of ∼10 μm to measure ethylene (C2H4) concentrations by use of a rotational component of the fundamental νv7 band. The laser is thermoelectrically cooled and operates in a pulsed mode. The influence of pulse-to-pulse fluctuations is minimized by use of a reference beam and a single detector with time discriminating electronics. Gas absorption is recorded in a 100-m optical path- length astigmatic Harriott cell. With a 10-kHz pulse repetition rate and an 80-s total acquisition time, a noise equivalent sensitivity of 30 parts per billion has been demonstrated. The sensor has been applied to monitor C2H4 in vehicle exhaust as well as in air collected in a high-traffic urban tunnel.",

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AU - Kosterev, Anatoliy A.

AU - Roller, Chad

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AU - Fraser, Matthew P.

AU - Tittel, Frank K.

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AB - We report on the development and performance of a gas sensor based on a quantum cascade laser operating at a wavelength of ∼10 μm to measure ethylene (C2H4) concentrations by use of a rotational component of the fundamental νv7 band. The laser is thermoelectrically cooled and operates in a pulsed mode. The influence of pulse-to-pulse fluctuations is minimized by use of a reference beam and a single detector with time discriminating electronics. Gas absorption is recorded in a 100-m optical path- length astigmatic Harriott cell. With a 10-kHz pulse repetition rate and an 80-s total acquisition time, a noise equivalent sensitivity of 30 parts per billion has been demonstrated. The sensor has been applied to monitor C2H4 in vehicle exhaust as well as in air collected in a high-traffic urban tunnel.

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Monitoring of ethylene by a pulsed quantum cascade laser

Abstract

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