Abstract

Modifications of a speckle pattern as a result of nonlinear interaction with cubic photorefractive crystal under an alternating applied field is investigated, experimentally and numerically. It is shown that the speckle pattern suffers a strong modification owing to polarization self-modulation and scattering by photoinduced crystal inhomogeneities. The spatial spectrum of the speckle field noticeably broadens when light passing the crystal. Thus the average size of speckle inhomogeneities decreases enhancing the sensitivity of vibration or displacement sensing schemes with photorefractive crystals. It is demonstrated that the speckle pattern modification is more considerable when the average size of input speckle field inhomogeneities is approximately equal to the drift length of charge carriers.

© 2001 Optical Society of America

PDF Article
More Like This
Polarization Self-Modulation in Photorefractive Crystals: Model and Applications

Alexei A. Kamshilin, A. V. Khomenko, and Kazuo Kuroda
AD8 Advances in Photorefractive Materials, Effects and Devices (APMED) 1999

Photorefractive Effect in Cubic Crystals under a Revolving Electric Field

A. V. Khomenko, I. Rocha-Mendoza, C. A. Fuentes-Hernández, Victor V. Prokofiev, and Ervin Nippolainen
476 Photorefractive Effects, Materials, and Devices (PEMD) 2001

Modeling of critical enhancement of photorefractive response in cubic crystals

E. V. Podivilov, B. I. Sturman, K. H. Ringhofer, M. V. Gorkunov, V. P. Kamenov, H. C. Pedersen, and P. M. Johansen
230 Photorefractive Effects, Materials, and Devices (PEMD) 2001

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription