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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Anthony J. Campillo
  • Vol. 32, Iss. 23 — Dec. 1, 2007
  • pp: 3465–3467

Signal spatial filtering for co-phasing in seeing-limited conditions

E. Pinna, F. Quirós-Pacheco, S. Esposito, A. Puglisi, and P. Stefanini  »View Author Affiliations


Optics Letters, Vol. 32, Issue 23, pp. 3465-3467 (2007)
http://dx.doi.org/10.1364/OL.32.003465


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Abstract

We present the results of the co-phasing closed loop performed with a pyramid wavefront sensor for what we believe to be the first time in the presence of emulated atmospheric disturbance. The performance of the co-phasing loop is significantly improved by applying two spatial filters in the sensor signal space. The first is a zonal filter applied to the interaction matrix before the computation of the reconstructor; the second is a modal filter applied to the sensor signals before the correction command computation. The presented laboratory results demonstrate that, applying both filters, the time requested to average out the atmospheric disturbance in each loop step is reduced by 2 orders of magnitude, improving the loop stability and accuracy.

© 2007 Optical Society of America

OCIS Codes
(120.5050) Instrumentation, measurement, and metrology : Phase measurement
(350.1260) Other areas of optics : Astronomical optics
(350.4800) Other areas of optics : Optical standards and testing

ToC Category:
Remote Sensing and Sensors

History
Original Manuscript: August 20, 2007
Revised Manuscript: October 30, 2007
Manuscript Accepted: November 1, 2007
Published: November 29, 2007

Citation
E. Pinna, F. Quirós-Pacheco, S. Esposito, A. Puglisi, and P. Stefanini, "Signal spatial filtering for co-phasing in seeing-limited conditions," Opt. Lett. 32, 3465-3467 (2007)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-32-23-3465

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