Frequency analysis of temperature-dependent interferometric signal for the measurement of the temperature coefficient of refractive index

From National Research Council Canada

Download
  1. (PDF, 788 KB)
DOIResolve DOI: https://doi.org/10.1063/1.4958820
AuthorSearch for: 1; Search for: 1; Search for: 1
Name affiliation
  1. National Research Council Canada. Energy, Mining and Environment
FormatText
TypeArticle
Journal titleReview of Scientific Instruments
ISSN0034-6748
1089-7623
Volume87
Issue7
Article number073104
Subjecttemperature coefficient of refractive index; peak analysis; frequency analysis; noise reduction
Abstract
A method of frequency analysis for the measurement of the temperature coefficient of refractive index (dn/dT) using a Fabry–Perot interferometer was developed and tested against ethanol and water. The temperature-dependent interferometric signal described by Airy’s formula was analyzed in both the temperature and frequency domains. By fast Fourier transform, a low-pass filter was designed and employed to eliminate the noise superimposed on the signal. dn/dT was determined accurately from the noise-removed signal by peak analysis. Furthermore, the signal frequency parameters may be utilized for the material thermophysical property characterization. This method lays the foundation for an online dn/dT instrument for monitoring chemical processes.
Publication date
LanguageEnglish
Peer reviewedYes
NRC numberNRC-EME_55777
NPARC number23001053
Export citationExport as RIS
Report a correctionReport a correction
Record identifierc0eb6f16-89d8-4e81-b014-0c8387a943e1
Record created2016-12-06
Record modified2020-03-16
Report a problem on this page
Date modified: