Fiber-optic evanescent-field laser sensor for in-situ gas diagnostics

Willer, Ulrike; Scheel, Dirk; Kostjucenko, Irina; Bohling, Christian; Schade, Wolfgang; Faber, Eckhard

doi:10.1016/s1386-1425(02)00058-6

Cited by 42 publications

(19 citation statements)

References 8 publications

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“…For this spectral range, high-quality, low-cost telecommunication fibers are easily available. These can withstand the high temperatures and chemical aggressive environment and the whole sensor head can be inserted into the fumaroles enabling a measurement of the gaseous species before contact and reaction with the surrounding air [19]. Fig.…”

Section: Article In Pressmentioning

confidence: 99%

Near- and mid-infrared laser monitoring of industrial processes, environment and security applications

Willer

Saraji

Khorsandi

et al. 2006

Optics and Lasers in Engineering

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127

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Section: Article In Pressmentioning

confidence: 99%

Near- and mid-infrared laser monitoring of industrial processes, environment and security applications

Willer

Saraji

Khorsandi

et al. 2006

Optics and Lasers in Engineering

Self Cite

282

127

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“…Luminescent sensors often have long delay times and so are not suited to exhaust gas sensing where the concentrations change rapidly. A wide range of absorption-based techniques exist including a whole range of evanescent wave gas sensors [8]- [11], single-pass cell sensors [12], [13] and multipass cell sensors [14]- [16]. Evanescent wave gas sensors can have sensitivity issues as the interaction between the optical light and the test gas is often very limited.…”

Section: Introductionmentioning

confidence: 99%

Low Concentration Monitoring of Exhaust Gases Using a UV-Based Optical Sensor

et al. 2007

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The development of an ultra-violet (UV) differential optical absorption spectroscopy (DOAS) fibre-optic sensor for the monitoring of vehicle exhaust gases is described in this paper. Experimental results describing the operation of this sensor with NO 2 SO 2 , and NO are shown. These experimental results are compared with existing published spectroscopic absorption measurements. It is shown that the minimum detectable concentration of NO 2 is 1 ppm, SO 2 is 1 ppm, and NO is 26 ppm. The sensor was found to have a low susceptibility to interference between the detection of these gases. Index Terms-differential optical absorption spectroscopy (DOAS), exhaust gas sensing, pollution monitoring, spectroscopy, ultra-violet (UV).

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“…However luminescent sensors often have long delay times and so are often not suited to exhaust gas sensing where the concentrations change rapidly. A wide range of optical absorption based techniques exist including evanescent wave gas sensors [17,18], singlepass cell sensors [19] and multipass cell sensors [20]. Evanescent wave gas sensors can have sensitivity issues as the interaction between the optical light and the test gas is often very limited.…”

Section: Current Technologiesmentioning

confidence: 99%