OSA's Digital Library

Optics Letters

Optics Letters


  • 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)

View Full Text Article

Enhanced HTML    Acrobat PDF (319 KB)

Browse Journals / Lookup Meetings

Browse by Journal and Year


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools



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

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

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)

Sort:  Year  |  Journal  |  Reset  


  1. G. Chanan, M. Troy, I. Crossfield, J. Nelson, and T. Mast, Proc. SPIE 6267, 62672V (2006). [CrossRef]
  2. S. Esposito and N. Devaney, in Beyond Conventional Adaptive Optics, Vol. 58 of ESO Conference and Workshop Proceedings (European Southern Observatory, 2001), pp. 161-166.
  3. That is because there will be tens of segments on the diameter of the ELT primary mirror and the signal is localized on the segments edges.
  4. S. Esposito and A. Riccardi, Astron. Astrophys. 369, L9 (2001). [CrossRef]
  5. N. Yaitskova, F. Gonte, F. Derie, L. Noethe, I. Surdej, R. Karban, K. Dohlen, M. Langlois, S. Esposito, E. Pinna, M. Reyes, L. Montoya, and D. Terrett, Proc. SPIE 626762672Z (2006). [CrossRef]
  6. S. Esposito, O. Feeney, and A. Riccardi, Proc. SPIE 4007, 416 (2000). [CrossRef]
  7. S. Esposito, E. Pinna, A. Puglisi, A. Tozzi, and P. Stefanini, Opt. Lett. 30, 2572 (2005). [CrossRef] [PubMed]

Cited By

Alert me when this paper is cited

OSA is able to provide readers links to articles that cite this paper by participating in CrossRef's Cited-By Linking service. CrossRef includes content from more than 3000 publishers and societies. In addition to listing OSA journal articles that cite this paper, citing articles from other participating publishers will also be listed.


Fig. 1 Fig. 2 Fig. 3
Fig. 4

« Previous Article  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited