Measurement of unsteady gas temperature with optical fibre Fabry-Perot microsensors

James M Kilpatrick, W. N. Macpherson, J. S. Barton, J. D C Jones, D. R. Buttsworth, T. V. Jones, K. S. Chana, S. J. Anderson

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)


We describe the application of thin-film optical fibre Fabry-Perot (FFP) microsensors to high-bandwidth measurement of unsteady total temperature in transonic gas flows. An aerodynamic probe containing two temperature sensitive FFP microsensors was deployed in the rotor exit flow region of a gas turbine research rig. Measurements reveal gas temperature oscillations typically 4 K peak to peak at the blade passing frequency of 10 kHz with components to the third harmonic detected in the power spectrum of the temperature signal.

Original languageEnglish
Pages (from-to)706-712
Number of pages7
JournalMeasurement Science and Technology
Issue number5
Publication statusPublished - May 2002


  • Fabry-Perot cavity
  • Gas temperature
  • Gas turbine
  • Optical fibre sensor
  • Turbomachinery
  • Unsteady temperature


Dive into the research topics of 'Measurement of unsteady gas temperature with optical fibre Fabry-Perot microsensors'. Together they form a unique fingerprint.

Cite this