We report Shack-Hartmann wavefront sensors using arrays of high-fill-factor Geiger-mode quad cells hybridized to digital CMOS counting circuits. The absence of readout noise facilitates fast wavefront sensing at low light levels.
© 2008 Optical Society of America
B. F. Aull, M. J. Renzi, A. H. Loomis, D. J. Young, B. J. Felton, T. A. Lind, D. M. Craig, and R. L. Johnson, "Geiger-Mode Quad-Cell Array for Adaptive Optics," in Conference on Lasers and Electro-Optics/Quantum Electronics and Laser Science Conference and Photonic Applications Systems Technologies, OSA Technical Digest (CD) (Optical Society of America, 2008), paper CWF2.
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