Progress towards subsurface spectroscopy inside heterogeneous materials using four wave mixing phase conjugation

Benjamin R. Anderson; Hergen Eilers

doi:10.1117/12.3029057

2 October 2024 Progress towards subsurface spectroscopy inside heterogeneous materials using four wave mixing phase conjugation

Benjamin R. Anderson, Hergen Eilers

Author Affiliations +

Proceedings Volume 13139, Ultrafast Nonlinear Imaging and Spectroscopy XII; 131390Q (2024) https://doi.org/10.1117/12.3029057
Event: Optical Engineering + Applications, 2024, San Diego, California, United States

Abstract

We report preliminary results on subsurface spectroscopy inside heterogeneous materials using four wave mixing phase conjugation. For our test material we use an inert plastic bonded explosive simulant that contains fluorescent guidestar particles. Using phase conjugation, we are able to obtain spectral enhancements approximately equal to the phase conjugate reflectivity. Additionally, we discuss future directions to improve this technique to obtain greater signal enhancements.

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Citation Download Citation

Benjamin R. Anderson and Hergen Eilers "Progress towards subsurface spectroscopy inside heterogeneous materials using four wave mixing phase conjugation", Proc. SPIE 13139, Ultrafast Nonlinear Imaging and Spectroscopy XII, 131390Q (2 October 2024); https://doi.org/10.1117/12.3029057

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