Up-Conversion Sensing of 2D Spatially-Modulated Infrared Information-Carrying Beams with Si-Based Cameras

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Title: Up-Conversion Sensing of 2D Spatially-Modulated Infrared Information-Carrying Beams with Si-Based Cameras
Authors: Torregrosa, Adrián José | Karamehmedović, Emir | Maestre, Haroldo | Rico Soliveres, María Luisa | Capmany, Juan
Research Group/s: Tecnología Informática Avanzada - Seguridad Legal
Center, Department or Service: Universidad de Alicante. Departamento de Tecnología Informática y Computación
Keywords: Image up-conversion | Infrared imaging | Free-space laser communications | Intra-cavity wavelength conversion | Infrared sensing
Knowledge Area: Arquitectura y Tecnología de Computadores
Issue Date: 26-Jun-2020
Publisher: MDPI
Citation: Torregrosa AJ, Karamehmedović E, Maestre H, Rico ML, Capmany J. Up-Conversion Sensing of 2D Spatially-Modulated Infrared Information-Carrying Beams with Si-Based Cameras. Sensors. 2020; 20(12):3610. doi:10.3390/s20123610
Abstract: Up-conversion sensing based on optical heterodyning of an IR (infrared) image with a local oscillator laser wave in a nonlinear optical sum-frequency mixing (SFM) process is a practical solution to circumvent some limitations of IR image sensors in terms of signal-to-noise ratio, speed, resolution, or cooling needs in some demanding applications. In this way, the spectral content of an IR image can become spectrally shifted to the visible/near infrared (VIS/NWIR) and then detected with silicon focal plane arrayed sensors (Si-FPA), such as CCD/CMOS (charge-coupled and complementary metal-oxide-semiconductor devices). This work is an extension of a previous study where we recently introduced this technique in the context of optical communications, in particular in FSOC (free-space optical communications). Herein, we present an image up-conversion system based on a 1064 nm Nd3+: YVO4 solid-state laser with a KTP (potassium titanyl phosphate) nonlinear crystal located intra-cavity where a laser beam at 1550 nm 2D spatially-modulated with a binary Quick Response (QR) code is mixed, giving an up-converted code image at 631 nm that is detected with an Si-based camera. The underlying technology allows for the extension of other IR spectral allocations, construction of compact receivers at low cost, and provides a natural way for increased protection against eavesdropping.
Sponsor: The authors acknowledge the financial support from the European Union’s ERDF Funds and the Government of Spain through the Project TEC2017-88899-C2-1-R (Ministerio de Ciencia e Innovación (MCI), Agencia Estatal de Investigación (AEI) y Fondo Europeo de Desarrollo Regional (FEDER).
URI: http://hdl.handle.net/10045/107853
ISSN: 1424-8220
DOI: 10.3390/s20123610
Language: eng
Type: info:eu-repo/semantics/article
Rights: © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
Peer Review: si
Publisher version: https://doi.org/10.3390/s20123610
Appears in Collections:INV - TIA-SL - Artículos de Revistas

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