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Holographic wavefront sensor based on Karhunen-Loève decomposition

: Anzuola, Esdras; Zepp, Andreas; Gladysz, Szymon; Stein, Karin


Eijk, A.M.J. van ; Society of Photo-Optical Instrumentation Engineers -SPIE-, Bellingham/Wash.:
Laser Communication and Propagation through the Atmosphere and Oceans V : San Diego, California, August 28, 2016
Bellingham, WA: SPIE, 2016 (Proceedings of SPIE 9979)
Paper 99790X
Conference "Laser Communication and Propagation through the Atmosphere and Oceans" <5, 2016, San Diego/Calif.>
Conference Paper
Fraunhofer IOSB ()

In this paper we introduce the use of Karhunen-Loève functions as a basis set to decompose atmospheric phase aberrations in a digital holographic wavefront sensor (HWS). We show that the intermodal crosstalk when using Karhunen-Loève functions is reduced in comparison to the Zernike decomposition. Additionally, the sensor’s response showed an improved linearity and better robustness to scintillation. Intermodal crosstalk remains a significant problem for this sensor but operation of an adaptive optics system based on HWS is less challenging when using Karhunen-Loève functions instead of Zernike polynomials.