Abstract

Experimental results are presented for an adaptive optics system based on a quadrature Twyman–Green interferometric wave-front sensor. The system uses a circularly polarized reference beam to form two interferograms with a π/2 phase shift. The experiments conducted used Kolmogorov phase screens to simulate atmospheric phase distortions. Strehl ratio improvements by a factor of 8, to an absolute value of 0.45, are demonstrated.

© 2004 Optical Society of America

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References

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  1. J. W. Hardy, Adaptive Optics for Astronomical Telescopes (Oxford University, London, 1998).
  2. R. K. Tyson, Principles of Adaptive Optics (Academic, New York, 1998).
  3. R. Dou and M. K. Giles, Opt. Lett. 20, 1583 (1995).
    [CrossRef] [PubMed]
  4. T. Shirai, T. H. Barnes, and T. G. Haskell, Opt. Lett. 25, 773 (2000).
    [CrossRef]
  5. C. J. Buchenauer and A. R. Jacobson, Rev. Sci. Instrum. 48, 769 (1977).
    [CrossRef]
  6. J. W. Goodman, Introduction to Fourier Optics (McGraw-Hill, New York, 1996).

2000 (1)

1995 (1)

1977 (1)

C. J. Buchenauer and A. R. Jacobson, Rev. Sci. Instrum. 48, 769 (1977).
[CrossRef]

Barnes, T. H.

Buchenauer, C. J.

C. J. Buchenauer and A. R. Jacobson, Rev. Sci. Instrum. 48, 769 (1977).
[CrossRef]

Dou, R.

Giles, M. K.

Goodman, J. W.

J. W. Goodman, Introduction to Fourier Optics (McGraw-Hill, New York, 1996).

Hardy, J. W.

J. W. Hardy, Adaptive Optics for Astronomical Telescopes (Oxford University, London, 1998).

Haskell, T. G.

Jacobson, A. R.

C. J. Buchenauer and A. R. Jacobson, Rev. Sci. Instrum. 48, 769 (1977).
[CrossRef]

Shirai, T.

Tyson, R. K.

R. K. Tyson, Principles of Adaptive Optics (Academic, New York, 1998).

Opt. Lett. (2)

Rev. Sci. Instrum. (1)

C. J. Buchenauer and A. R. Jacobson, Rev. Sci. Instrum. 48, 769 (1977).
[CrossRef]

Other (3)

J. W. Goodman, Introduction to Fourier Optics (McGraw-Hill, New York, 1996).

J. W. Hardy, Adaptive Optics for Astronomical Telescopes (Oxford University, London, 1998).

R. K. Tyson, Principles of Adaptive Optics (Academic, New York, 1998).

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Figures (3)

Fig. 1
Fig. 1

Closed-loop AO layout: BS, beam splitters; M, mirrors; L, lenses; λ/2 and λ/4, half- and quarter-wave plates, respectively; WFS, wave-front sensor.

Fig. 2
Fig. 2

(a) Dual interferograms and an oversized portion of the reference beams and (b) intensity profiles of the probe beams.

Fig. 3
Fig. 3

Phase and far-field images for open-loop operation of the AO system. (a) and (b) Phase of an aberrated wave front through three Kolmogorov phase screens before and after correction, respectively. (c) and (d) The corresponding uncorrected and corrected far-field images, respectively.

Equations (2)

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Ifringe cos=Iref+Iprobe+2IprobeIref1/2 cosϕ,
Ifringe sin=Iref+Iprobe+2IprobeIref1/2 sinϕ,

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