Signal-to-noise ratio in chirped laser dispersion spectroscopy

Michal Nikodem; Damien Weidmann; Clinton Smith; Gerard Wysocki

doi:10.1364/OE.20.000644

Signal-to-noise ratio in chirped laser dispersion spectroscopy

Michal Nikodem, Damien Weidmann, Clinton Smith, Gerard Wysocki

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

28 Scopus citations

Abstract

Quantitative studies and experimental validation of noise sources occurring in chirped laser dispersion spectroscopy (CLaDS) are reported. Their impact on the signal-to-noise ratio (SNR) achievable with the CLaDS sensing method is analyzed through a noise model supported by experimental results. In particular the model shows that the SNR is optimal for a given value of the laser chirp rate. The experimental studies are conducted with a quantum cascade laser operating at 5.2 μm for the detection of nitric oxide. Optical fringing has been found to be a significant non-random source of noise and an effective reduction method that can improve the SNR is also discussed.

Original language	English (US)
Pages (from-to)	644-653
Number of pages	10
Journal	Optics Express
Volume	20
Issue number	1
DOIs	https://doi.org/10.1364/OE.20.000644
State	Published - Jan 2 2012

All Science Journal Classification (ASJC) codes

Atomic and Molecular Physics, and Optics

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10.1364/OE.20.000644

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abstract = "Quantitative studies and experimental validation of noise sources occurring in chirped laser dispersion spectroscopy (CLaDS) are reported. Their impact on the signal-to-noise ratio (SNR) achievable with the CLaDS sensing method is analyzed through a noise model supported by experimental results. In particular the model shows that the SNR is optimal for a given value of the laser chirp rate. The experimental studies are conducted with a quantum cascade laser operating at 5.2 μm for the detection of nitric oxide. Optical fringing has been found to be a significant non-random source of noise and an effective reduction method that can improve the SNR is also discussed.",

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AU - Weidmann, Damien

AU - Smith, Clinton

AU - Wysocki, Gerard

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AB - Quantitative studies and experimental validation of noise sources occurring in chirped laser dispersion spectroscopy (CLaDS) are reported. Their impact on the signal-to-noise ratio (SNR) achievable with the CLaDS sensing method is analyzed through a noise model supported by experimental results. In particular the model shows that the SNR is optimal for a given value of the laser chirp rate. The experimental studies are conducted with a quantum cascade laser operating at 5.2 μm for the detection of nitric oxide. Optical fringing has been found to be a significant non-random source of noise and an effective reduction method that can improve the SNR is also discussed.

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Signal-to-noise ratio in chirped laser dispersion spectroscopy

Abstract

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