Design, alignment, and calibration of a focused laser differential interferometer

Creators: Neet, Mallory C.; Lawson, Joel M.; Austin, Joanna M.

Abstract

Methods are presented for systematic selection of optical components and dimensions for the design of both single- and double-focused laser differential interferometers (FLDIs). Step-by-step instructions for the assembly and alignment of each FLDI component are given, including detailed figures of the interferometer fringe behavior, as the required infinite-fringe configuration is approached. Calibration and data post-processing techniques are provided in order to obtain quantitative signals from the FLDI.

Additional Information

© 2021 Optical Society of America. Received 1 July 2021; accepted 22 July 2021; posted 2 August 2021 (Doc. ID 435112); published 2 September 2021. The authors would like to thank Prof. J. E. Shepherd for his continuing interest in FLDI, and for his numerous ideas on how the technique might be extended and improved. Thanks also to Dr. I. J. Grossman for his design work and procurement of the FLDI system described here. This work was partially supported by the ONR with Dr. Eric Marineau and the AFRL with Dr. Daniel Reasor. Data Availability. Data underlying the results presented in this paper are not publicly available at this time but may be obtained from the authors upon reasonable request. Funding. Air Force Research Laboratory (AFRL) (STTR FA8651-17-C-0071); Office of Naval Research (ONR) (N00014-16-1-2503). The authors declare no conflicts of interest.

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Design, alignment, and calibration of a focused laser differential interferometer

Abstract

Additional Information

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