Sensitive and ultra-fast species detection using pulsed cavity ringdown spectroscopy

Awad B.S. Alquaity; Et Touhami Es-Sebbar; Aamir Farooq

doi:10.1364/OE.23.007217

Sensitive and ultra-fast species detection using pulsed cavity ringdown spectroscopy

Awad B.S. Alquaity, Et Touhami Es-Sebbar, Aamir Farooq

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

17 Scopus citations

Abstract

Pulsed cavity ringdown spectroscopy (CRDS) is used to develop a novel, ultra-fast, high-sensitivity diagnostic for measuring species concentrations in shock tube experiments. The diagnostic is demonstrated by monitoring trace concentrations of ethylene in the mid-IR region near 949.47 cm^-1. Each ringdown measurement is completed in less than 1 μs and the time period between successive pulses is 10 μs. The high sensitivity diagnostic has a noise-equivalent detection limit of 1.08 x 10^-5 cm^-1 which enables detection of 15 ppm ethylene at fuel pyrolysis conditions (1845 K and 2 bar) and 294 ppb ethylene under ambient conditions (297 K and 1 bar). To our knowledge, this is the first successful application of the cavity ringdown method to the measurement of species time-histories in a shock tube.

Original language	English
Pages (from-to)	7217-7226
Number of pages	10
Journal	Optics Express
Volume	23
Issue number	6
DOIs	https://doi.org/10.1364/OE.23.007217
State	Published - 23 Mar 2015
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2015 OSA.

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics

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10.1364/OE.23.007217

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title = "Sensitive and ultra-fast species detection using pulsed cavity ringdown spectroscopy",

abstract = "Pulsed cavity ringdown spectroscopy (CRDS) is used to develop a novel, ultra-fast, high-sensitivity diagnostic for measuring species concentrations in shock tube experiments. The diagnostic is demonstrated by monitoring trace concentrations of ethylene in the mid-IR region near 949.47 cm-1. Each ringdown measurement is completed in less than 1 μs and the time period between successive pulses is 10 μs. The high sensitivity diagnostic has a noise-equivalent detection limit of 1.08 x 10-5 cm-1 which enables detection of 15 ppm ethylene at fuel pyrolysis conditions (1845 K and 2 bar) and 294 ppb ethylene under ambient conditions (297 K and 1 bar). To our knowledge, this is the first successful application of the cavity ringdown method to the measurement of species time-histories in a shock tube.",

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AU - Es-Sebbar, Et Touhami

AU - Farooq, Aamir

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Sensitive and ultra-fast species detection using pulsed cavity ringdown spectroscopy

Abstract

Bibliographical note

ASJC Scopus subject areas

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