Measuring spatial temperature nonuniformity using single-beam dual-comb absorption spectroscopy
Malarich, Nathan A.
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https://hdl.handle.net/2142/107694
Description
Title
Measuring spatial temperature nonuniformity using single-beam dual-comb absorption spectroscopy
Author(s)
Malarich, Nathan A.
Contributor(s)
Rieker, Gregory B.
Issue Date
2020-06-22
Keyword(s)
Instrument/Technique Demonstration
Abstract
Absorption spectroscopy typically recovers the average thermodynamic properties along a laser path. However, broadband laser sources, including the dual frequency comb spectrometer, measure many absorption features which provide different temperature information about the path nonuniformity. We have developed a two-step approach to extract a nonuniform temperature distribution from a broadband absorption spectrum spanning hundreds of absorption features. We demonstrate how this approach resolves the path nonuniformity in a tube furnace as predicted by natural convection theory.
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