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Open- and closed-loop aberration correction by use of a quadrature interferometric wave-front sensor

Kevin L. Baker, Eddy A. Stappaerts, Scott C. Wilks, Peter E. Young, Donald T. Gavel, Jack W. Tucker, Dennis A. Silva, and Scot S. Olivier

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Abstract

Experimental results are presented for an adaptive optics system based on a quadrature Twyman–Green interferometric wave-front sensor. The system uses a circularly polarized reference beam to form two interferograms with a π/2 phase shift. The experiments conducted used Kolmogorov phase screens to simulate atmospheric phase distortions. Strehl ratio improvements by a factor of 8, to an absolute value of 0.45, are demonstrated.

© 2004 Optical Society of America

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