Spatial Hadamard encoding with difference frequency generation

Yang Xu; Sirui Tang; A. Nicholas Black; Robert W. Boyd

doi:10.1117/12.3005370

12 March 2024 Spatial Hadamard encoding with difference frequency generation

Yang Xu, Sirui Tang, A. Nicholas Black, Robert W. Boyd

Proceedings Volume 12869, Nonlinear Frequency Generation and Conversion: Materials and Devices XXIII; 128690O (2024) https://doi.org/10.1117/12.3005370
Event: SPIE LASE, 2024, San Francisco, California, United States

Abstract

Orthogonal optical coding is widely used in classical multi-user communication networks. Using the phase conjugation property of stimulated parametric down-conversion, we extend the current time-domain orthogonal optical coding scheme to the spatial domain to encode and decode image information. In this process, the idler beam inherits the complex conjugate of the field information encoded in the seed beam. An encoding phase mask introduced onto the input seed beam blurs the image transferred to the idler. The original image is restored by passing the coded transferred image through a corrective phase mask placed in the momentum space of the idler beam. We expect that this scheme can also inspire new techniques in secure image transmission, aberration cancellation, and frequency conversion imaging.

Conference Presentation

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Yang Xu, Sirui Tang, A. Nicholas Black, and Robert W. Boyd "Spatial Hadamard encoding with difference frequency generation", Proc. SPIE 12869, Nonlinear Frequency Generation and Conversion: Materials and Devices XXIII, 128690O (12 March 2024); https://doi.org/10.1117/12.3005370

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