Interference imaging of photorefractive record in thin sample of LiNbO3 crystal

Ivan Turek; Norbert Tarjányi

doi:10.1117/12.638916

6 December 2006 Interference imaging of photorefractive record in thin sample of LiNbO₃ crystal

Ivan Turek, Norbert Tarjányi

Proceedings Volume 5945, 14th Slovak-Czech-Polish Optical Conference on Wave and Quantum Aspects of Contemporary Optics; 59450J (2006) https://doi.org/10.1117/12.638916
Event: 14th Slovak-Czech-Polish Optical Conference on Wave and Quantum Aspects of Contemporary Optics, 2005, Nitra, Slovakia

Abstract

Short analyze and some results of interference imaging of refractive index distribution in photorefractive records in the LiNbO₃ sample are presented. The presented result shows that an easily readable image can be obtained when refractive index is modulated only in direction parallel with interference fringes. For this purpose, it is useful to use Mach-Zehnder interferometer what allows adjusting the interference fringes to desired position. Obtained images of records of a light field with aperiodic distribution of intensity show that refractive index profiles do not correspond to profile of light intensity or intensity of internal electric field (which is formed by the sample illumination). It is more like the profile of distribution of carrier concentration trapped on the donors or profile of square of the electric field when gradient of refractive index is parallel or perpendicular to c axis of the crystal, respectively. This result leads to necessity of modifying explanation of mechanism of photorefractive record creation. At least in investigated LiNbO₃:Fe.

Citation Download Citation

Ivan Turek and Norbert Tarjányi "Interference imaging of photorefractive record in thin sample of LiNbO₃ crystal", Proc. SPIE 5945, 14th Slovak-Czech-Polish Optical Conference on Wave and Quantum Aspects of Contemporary Optics, 59450J (6 December 2006); https://doi.org/10.1117/12.638916

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