Sequential signal detection for high dynamic range time-resolved laser-induced incandescence

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DOIResolve DOI: http://doi.org/10.1364/OE.25.002413
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TypeArticle
Journal titleOptics Express
ISSN1094-4087
Volume25
Issue3
Pages24132421
AbstractA new method for collecting time-resolved laser-induced incandescence (TiRe-LII) signals with high dynamic range is presented. Gated photomultiplier tubes (PMT) are used to detect temporal sections of the LII signal. This helps to overcome the limitations of PMTs caused by restricted maximum signal current at the strong initial signal and poor signal-to-noise ratios when the signal intensity approaches the noise level. We present a simple method for increasing the accuracy of two-color pyrometry at later decay times and two advanced strategies for getting high accuracy over the complete temperature trace or even achieve single-shot capability with high dynamic range. Validation measurements in a standardized flame show that the method is sensitive enough to even resolve the local increase in gas temperature as a consequence of heating the soot particles with a laser pulse.
Publication date
LanguageEnglish
AffiliationMeasurement Science and Standards; National Research Council Canada
Peer reviewedYes
NPARC number23001539
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Record identifier735bd513-4905-47d3-92b6-51deab652996
Record created2017-03-03
Record modified2017-03-03
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