Multi-wavelength phase unwrapping: a versatile tool for extending the measurement range, breaking the Nyquist limit, and encrypting optical communications

Konstantinos Falaggis; Ana Hiza Ramirez-Andrade; David Towers; Catherine Towers; Rosario Porras-Aguilar

doi:10.1117/12.2321987

18 August 2018 Multi-wavelength phase unwrapping: a versatile tool for extending the measurement range, breaking the Nyquist limit, and encrypting optical communications

Konstantinos Falaggis, Ana Hiza Ramirez-Andrade, David Towers, Catherine Towers, Rosario Porras-Aguilar

Author Affiliations +

Proceedings Volume 10749, Interferometry XIX; 1074913 (2018) https://doi.org/10.1117/12.2321987
Event: SPIE Optical Engineering + Applications, 2018, San Diego, California, United States

Abstract

Multi-wavelength phase unwrapping techniques have traditionally been used to unwrap the phase at the shortest measurement wavelength, where numerous techniques have been developed with distinct advantages for a given application. Nevertheless, multi-wavelength techniques are more than phase unwrapping approaches: super-sensitive multiwavelength interferometers have a lower uncertainty than conventional interferometers, multi-wavelength techniques can break the Nyquist limit and thereby relax the requirements on the measurement system, and multi-wavelength techniques have also unconventional applications as e.g. optical encryption. This work discusses different multi-wavelength techniques, derives new noise criteria with no approximations, and outlines important, but still little researched areas of multi-wavelength phase unwrapping techniques.

Citation Download Citation

Konstantinos Falaggis, Ana Hiza Ramirez-Andrade, David Towers, Catherine Towers, and Rosario Porras-Aguilar "Multi-wavelength phase unwrapping: a versatile tool for extending the measurement range, breaking the Nyquist limit, and encrypting optical communications", Proc. SPIE 10749, Interferometry XIX, 1074913 (18 August 2018); https://doi.org/10.1117/12.2321987

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