Mode-selective Image Upconversion
arXiv:1810.07552 · doi:10.1364/OL.44.000098
Abstract
We study selective upconversion of optical signals according to their detailed transverse electromagnetic modes, and demonstrate its proof of operations in a nonlinear crystal. The mode selectivity is achieved by preparing the pump wave in an optimized spatial profile to drive the upconversion. For signals in the Laguerre-Gaussian modes, we show that a mode can be converted with up to 60 times higher efficiency than an overlapping but orthogonal mode. This nonlinear-optical approach may find applications in compressive imaging, pattern recognition, quantum communications, and others where the existing linear-optical methods are limited.
arXiv comment5 pages, 3 figures and 1 Table
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