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Characterization of a Focused Laser Differential Interferometer

Lawson, Joel M. and Neet, Mallory C. and Grossman, Ilan J. and Austin, Joanna M. (2019) Characterization of a Focused Laser Differential Interferometer. In: AIAA Scitech 2019 Forum. American Institute of Aeronautics and Astronautics , Reston, VA, Art. No. 2019-2296. ISBN 978-1-62410-578-4.

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A focused laser differential interferometer (FLDI) has been experimentally characterized. The static response was probed using a steady, laminar helium jet, and the dynamic response was investigated using a free ultrasonic acoustic beam. In the case of the jet, the refractive index field was independently measured using a Mach-Zehnder interferometer operating simultaneously alongside FLDI. The experimental data were compared with numerical simulations of the FLDI response based on geometric optics and a ray-tracing algorithm. Close quantitative agreement was found between data and simulation results, validating this approach to modeling FLDI performance. Emphasis was given to quantification of the spatial sensitivity of the system, a key characteristic of FLDI, especially when applied to hypersonic ground testing facilities where strong turbulent flow exists outside the core flow.

Item Type:Book Section
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URLURL TypeDescription ItemJournal Article
Lawson, Joel M.0000-0002-3042-0909
Austin, Joanna M.0000-0003-3129-5035
Additional Information:© 2019 American Institute of Aeronautics and Astronautics. Published by the American Institute of Aeronautics and Astronautics, Inc. Published Online: 6 Jan 2019. The authors would like to gratefully acknowledge Prof. J. E. Shepherd for all his guidance and interest in this project, as well as providing the laboratory space to perform the experimental work. This work was partially supported by the Office of Naval Research award N00014-16-1-2503 with Dr. Eric Marineau and the Air Force Research Laboratory award STTR FA8651-17-C-0071 with Dr. Daniel Reasor.
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Office of Naval Research (ONR)N00014-16-1-2503
Air Force Office of Scientific Research (AFOSR)FA8651-17-C-0071
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AIAA Paper2019-2296
Record Number:CaltechAUTHORS:20200806-124527212
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Official Citation:Characterization of a Focused Laser Differential Interferometer. Joel M. Lawson, Mallory C. Neet, Ilan J. Grossman, and Joanna M. Austin. AIAA Scitech 2019 Forum. January 2019; doi: 10.2514/6.2019-2296
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:104777
Deposited By: Tony Diaz
Deposited On:06 Aug 2020 20:41
Last Modified:23 Sep 2021 18:09

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