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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 51, Iss. 4 — Feb. 1, 2012
  • pp: 479–485

Talbot effect by a photorefractive volume phase grating

Gustavo Forte, Alberto Lencina, Myrian Tebaldi, and Néstor Bolognini  »View Author Affiliations


Applied Optics, Vol. 51, Issue 4, pp. 479-485 (2012)
http://dx.doi.org/10.1364/AO.51.000479


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Abstract

In our proposal a light intensity distribution generated by an incoherently illuminated planar amplitude grating is projected into a photorefractive crystal. This 3D distribution is mapped as an index refractive perturbation via the photorefractive effect thereby generating a volume phase grating. The self-imaging phenomenon in the Fresnel field of this volume phase grating coherently illuminated is theoretically and experimentally analyzed. A model to simulate this volume grating that considers the 3D light intensity distribution formed in the crystal combined with the photorefractive grating formation theory is proposed. A path-integral approach to calculate the self-image patterns which account for the inhomogeneous propagation through the photorefractive grating is employed. The experimental and theoretical results show that the self-images location coincides with that of the self-images generated by planar phase grating of the same period. Moreover, the self-images visibility depends on three parameters: the exit pupil diameter of the incoherent recording optical system, the external electric field applied on the crystal, and the crystal thickness. To study the visibility behavior, a phase parameter which includes the three mentioned parameters is proposed. The self-images visibility shows the typical sinusoidal dependence found in planar phase grating. A good agreement between theoretical and experimental results is observed.

© 2012 Optical Society of America

OCIS Codes
(050.7330) Diffraction and gratings : Volume gratings
(070.6760) Fourier optics and signal processing : Talbot and self-imaging effects
(160.5320) Materials : Photorefractive materials

ToC Category:
Diffraction and Gratings

History
Original Manuscript: July 25, 2011
Revised Manuscript: October 14, 2011
Manuscript Accepted: October 17, 2011
Published: January 26, 2012

Citation
Gustavo Forte, Alberto Lencina, Myrian Tebaldi, and Néstor Bolognini, "Talbot effect by a photorefractive volume phase grating," Appl. Opt. 51, 479-485 (2012)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-51-4-479


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References

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