C-RED 3: a SWIR camera for FSO applications

J. L. Gach; David Boutolleau; Cecile Brun; Thomas Carmignani; Fabien Clop; Philippe Feautrier; Stephane Lemarchand; Eric Stadler; Yann Wanwanscappel

doi:10.1117/12.2545823

2 March 2020 C-RED 3: a SWIR camera for FSO applications

J. L. Gach, David Boutolleau, Cecile Brun, Thomas Carmignani, Fabien Clop, Philippe Feautrier, Stephane Lemarchand, Eric Stadler, Yann Wanwanscappel

Author Affiliations +

Proceedings Volume 11272, Free-Space Laser Communications XXXII; 112720F (2020) https://doi.org/10.1117/12.2545823
Event: SPIE LASE, 2020, San Francisco, California, United States

Abstract

Free space communications (FSO) is interesting for distant applications where high bandwidth is needed while using a fiber is not possible. However these links have to face several issues, and the most important one is the beam scintillation due to the propagation through a turbulent media, the atmosphere. Several mitigation strategies have been developed, but the best way to suppress scintillation is to use adaptive optics, widely used now in astronomy. The main difficulty for FSO is to probe the wavefront fast enough to have a good turbulence correction. This was not possible due to the lack of wavefront sensors working in the SWIR. C-RED 3 is a 640x512 SWIR camera running at 600FPS full frame and has the legacy of all the developments of astronomical infrared fast wavefront sensors on top of specific features for FSO (Low SWaP, Low Cost). We will present the performances of this new camera and demonstrate how it fulfills the needs of FSO adaptive optics.

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J. L. Gach, David Boutolleau, Cecile Brun, Thomas Carmignani, Fabien Clop, Philippe Feautrier, Stephane Lemarchand, Eric Stadler, and Yann Wanwanscappel "C-RED 3: a SWIR camera for FSO applications", Proc. SPIE 11272, Free-Space Laser Communications XXXII, 112720F (2 March 2020); https://doi.org/10.1117/12.2545823

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