Infrared upconversion imaging with a spatially shaped pump

Maxime Mertens; Romain Demur; Luc Leviandier; Arnaud Grisard

doi:10.1117/12.2665582

5 June 2023 Infrared upconversion imaging with a spatially shaped pump

Maxime Mertens, Romain Demur, Luc Leviandier, Arnaud Grisard

Proceedings Volume 12569, Nonlinear Optics and Applications XIII; 1256902 (2023) https://doi.org/10.1117/12.2665582
Event: SPIE Optics + Optoelectronics, 2023, Prague, Czech Republic

Abstract

We perform infrared imaging upconversion of a coherent signal at 1550 nm using a spatially shaped pump. Our experimental and simulation results demonstrate that the use of a uniform pump beam (flat-top) can enhance the number of spatially resolved elements due to the better spatial distribution of the energy compared to the gaussian beam for which the finite transverse aperture of the crystal limits the suitable waist without being cut by the crystal. With a 1 × 1.5 mm² aperture crystal, we could convert 170 modes with a 400 μm radius flat-top pump against 156 with a 330 µm radius gaussian pump.

Conference Presentation

Citation Download Citation

Maxime Mertens, Romain Demur, Luc Leviandier, and Arnaud Grisard "Infrared upconversion imaging with a spatially shaped pump", Proc. SPIE 12569, Nonlinear Optics and Applications XIII, 1256902 (5 June 2023); https://doi.org/10.1117/12.2665582

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