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Optics Express

Optics Express

  • Editor: J. H. Eberly
  • Vol. 9, Iss. 3 — Jul. 30, 2001
  • pp: 152–157

A fast modal wave-front sensor

Erez N. Ribak and Steven M. Ebstein  »View Author Affiliations


Optics Express, Vol. 9, Issue 3, pp. 152-157 (2001)
http://dx.doi.org/10.1364/OE.9.000152


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Abstract

We describe an instantaneous modal wave-front sensor. The sensor uses a Shack-Hartmann lenslet array to encode the wave-front distortion. A novel parallel electro-optic processor continuously converts the spot pattern to wave-front modes, e.g. Zernike polynomials, without a separate reconstructor. Using readily available components, the sensor can achieve MHz bandwidths for twenty modes. The bandwidth, sensitivity, and number of bits can vary for each mode to match the sensor to the disturbance in an optimal fashion. The proposed sensor has immediate application to beam control and turbulence sensing applications that require wide bandwidths. The measured wave-front modes can also be those of an adaptive optics system, directly providing control signals for the actuators of a deformable mirror. A similar electronic reconstructor mode is also described.

© Optical Society of America

OCIS Codes
(010.1080) Atmospheric and oceanic optics : Active or adaptive optics
(200.0200) Optics in computing : Optics in computing

ToC Category:
Research Papers

History
Original Manuscript: June 25, 2001
Published: July 30, 2001

Citation
Erez Ribak and Steven Ebstein, "A fast modal wave-front sensor," Opt. Express 9, 152-157 (2001)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-9-3-152


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References

  1. S. M. Ebstein and E. N. Ribak, Proposal to DOD, SBIR AF97-105, 1997.
  2. C. Schwartz, E. N. Ribak, and G. Baum: "Implications of fractal structure of turbulence degraded wave fronts" J. Opt. Soc. A 11, 444-51 (1994). [CrossRef]
  3. M. A. A. Neil, M. J. Booth and T. Wilson, "New modal wave-front sensor: a theoretical analysis" J. Opt. Soc. A 17, 1098-107 (2000). [CrossRef]
  4. A. Wirth, J. Feinleib, L. E. Schmutz, D. H. Rapkine, R. F. Dillon and J. J. Hizny, "Opticalwavefront sensing system" US Patent 4725138 (1988).
  5. C. Papaliolios, P. Nisenson, and S. Ebstein, "Speckle Imaging with the PAPA Detector" Appl. Opt. 24, 285-9 (1985). [CrossRef]
  6. W. J. Wild, "Innovative wavefront estimators for zonal adaptive optics systems" Ch. 6 in Adaptive Optics Engineering Handbook, Ed. R. K. Tyson (Marcel Dekker, New York, 2000).

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