Optical heterodyne detection of orthogonal orbital angular momentum modes for sensing through turbid media

Nathaniel A. Ferlic; Alan E. Laux; Brandon M. Cochenour; Linda J. Mullen; Miranda Van Iersel; Christopher C Davis

doi:10.1117/12.2619304

30 May 2022 Optical heterodyne detection of orthogonal orbital angular momentum modes for sensing through turbid media

Nathaniel A. Ferlic, Alan E. Laux, Brandon M. Cochenour, Linda J. Mullen, Miranda Van Iersel, Christopher C Davis

Proceedings Volume 12118, Ocean Sensing and Monitoring XIV; 121180C (2022) https://doi.org/10.1117/12.2619304
Event: SPIE Defense + Commercial Sensing, 2022, Orlando, Florida, United States

Abstract

Remote sensing modalities can utilize the effects of laser scattering from particulate matter to infer information about environmental conditions present in the optical path. Light contains many degrees of freedom that can be manipulated for sensing. In this work the spatial phase distribution is leveraged through the use of light's orbital angular momentum (OAM). Our sensing method, called optical heterodyne detection of orthogonal OAM modes (OHDOOM), uses the distortion of the optical signal to determine the presence of environmental disturbances. OAM beams are sensitive to optical disturbances that induce phase variations, in turn, spreading power among other OAM modes. A set of experiments are performed using different solutions of particulate matter to create a turbid medium. The experimental results showed that OHDOOM is most likely sensitive to a turbid medium containing particles larger than the wavelength.

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Citation Download Citation

Nathaniel A. Ferlic, Alan E. Laux, Brandon M. Cochenour, Linda J. Mullen, Miranda Van Iersel, and Christopher C Davis "Optical heterodyne detection of orthogonal orbital angular momentum modes for sensing through turbid media", Proc. SPIE 12118, Ocean Sensing and Monitoring XIV, 121180C (30 May 2022); https://doi.org/10.1117/12.2619304

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