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Analysis of focused laser differential interferometry

Schmidt, B. E. and Shepherd, J. E. (2015) Analysis of focused laser differential interferometry. Applied Optics, 54 (28). pp. 8459-8472. ISSN 0003-6935.

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A computational method for predicting the output of a focused laser differential interferometer (FLDI) given an arbitrary density field is presented. The method is verified against analytical predictions and experimental data. The FLDI simulation software is applied to the problem of measuring Mack-mode wave packets in a hypervelocity boundary layer on a 5° half-angle cone. The software is shown to complement experiments by providing the necessary information to allow quantitative density fluctuation magnitudes to be extracted from experimental measurements.

Item Type:Article
Related URLs:
URLURL TypeDescription
Schmidt, B. E.0000-0001-9193-7760
Shepherd, J. E.0000-0003-3181-9310
Additional Information:© 2015 Optical Society of America. Received 10 July 2015; revised 31 August 2015; accepted 2 September 2015; posted 3 September 2015 (Doc. ID 245742); published 30 September 2015. The authors would like to thank Dr. Matthew Fulghum for helpful insights into how the FLDI attenuates unwanted signals. The authors would also like to thank Aditya Bhattaru for his assistance setting up the FLDI at Caltech during his Summer Undergraduate Research Fellowship in 2014. The authors would additionally like to thank Dr. Josué Melguizo-Gavilanes for performing the OpenFOAM computations in Section 4.B. Finally, the authors are very grateful to Neal Bitter for performing the boundary-layer stability calculations that provided the data for Section 5. The lead author acknowledges the support of Foster and Coco Stanback STEM Fellowship for his graduate studies.
Funding AgencyGrant Number
Caltech Summer Undergraduate Research Fellowship (SURF)UNSPECIFIED
Foster and Coco Stanback Postdoctoral FellowshipUNSPECIFIED
Issue or Number:28
Classification Code:OCIS codes: (120.3180) Interferometry; (000.2170) Equipment and techniques; (000.4430) Numerical approximation and analysis; (140.0140) Lasers and laser optics
Record Number:CaltechAUTHORS:20151023-081539014
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Official Citation:B. E. Schmidt and J. E. Shepherd, "Analysis of focused laser differential interferometry," Appl. Opt. 54, 8459-8472 (2015)
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:61466
Deposited By: Tony Diaz
Deposited On:26 Oct 2015 20:23
Last Modified:21 Aug 2020 20:52

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