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Issue 11, 2009
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Near-infrared broad-band cavity enhanced absorption spectroscopy using a superluminescent light emitting diode

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Abstract

A fibre coupled near-infrared superluminescent light emitting diode that emits ∼10 mW of radiation between 1.62 and 1.7 µm is employed in combination with a broad-band cavity enhanced spectrometer consisting of a linear optical cavity with mirrors of reflectivity ∼99.98% and either a dispersive near-infrared spectrometer or a Fourier transform interferometer. Results are presented on the absorption of 1,3-butadiene, and sensitivities are achieved of 6.1 × 10−8 cm−1 using the dispersive spectrometer in combination with phase-sensitive detection, and 1.5 × 10−8 cm−1 using the Fourier transform interferometer (expressed as a minimum detectable absorption coefficient) over several minutes of acquisition time.

Graphical abstract: Near-infrared broad-band cavity enhanced absorption spectroscopy using a superluminescent light emitting diode

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Publication details

The article was received on 14 Aug 2009, accepted on 22 Sep 2009 and first published on 24 Sep 2009


Article type: Communication
DOI: 10.1039/B916807A
Citation: Analyst, 2009,134, 2220-2223
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    Near-infrared broad-band cavity enhanced absorption spectroscopy using a superluminescent light emitting diode

    W. Denzer, M. L. Hamilton, G. Hancock, M. Islam, C. E. Langley, R. Peverall and G. A. D. Ritchie, Analyst, 2009, 134, 2220
    DOI: 10.1039/B916807A

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