Using the generalised-optical differentiation wavefront sensor for laser guide star wavefront sensing

Abstract

Laser guide stars (LGS) are used in many adaptive optics systems to extend sky coverage. The most common wavefront sensor used in combination with a LGS is a Shack-Hartmann wavefront sensor (SHWFS). The ShackHartmann has a major disadvantage for extended source wavefront sensing because it directly samples the image. In this proceeding we propose to use the generalized-Optical Differentation Wavefront Sensor (g-ODWFS) a wavefront sensor for wavefront sensing of LGS. The g-ODWFS uses only 4 pixels per sub-aperture, has little to no aliasing noise and therefore no spurious low-order errors and has no need for centroid gain calibrations. In this proceeding we show the results of simulations that compare the g-ODWFS with the SHWFS.

Authors 3

1. Sebastiaan Y. Haffert

   University of Arizona

   Affiliation as printed

   The Univ. of Arizona (United States)

   The University of Arizona, (United States)

2. Christoph U. Keller Aachen Leiden Univ. (Netherlands)

   Leiden University

   Affiliation as printed

   Leiden Univ. (Netherlands)

   Leiden University (Netherlands)

3. Richard G. Dekany

   California Institute of Technology

   Affiliation as printed

   Caltech (United States)

   Caltech, United States