7 October 2005 Improvement of diffraction efficiency for 90-degree holographic recording geometry by using external electric fields in Fe-doped LiNbO3 crystals
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Abstract
Significant improvements of photorefractive properties such as diffraction efficiency with 90-degree holographic recording geometry have been obtained by the application of external electric fields. Experimental results show that the highest diffraction efficiency can be obtained at least 3 times than without external electric field in Fe-doped LiNbO3 crystals. The vectorial Kukhtarev equations are modified in single center model taking into account the directions of optical axis and external electric field. The photorefractive properties of single doped LiNbO3:Fe crystal using 90-degree storage geometry are theoretically investigated by jointly solving the vectorial material equations and the two dimensional coupled wave equations. The variation trends of the theoretical results are similar to the experimental results.
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Aimin Yan, De'an Liu, Yu Zhou, Zhu Luan, Liren Liu, "Improvement of diffraction efficiency for 90-degree holographic recording geometry by using external electric fields in Fe-doped LiNbO3 crystals", Proc. SPIE 5911, Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications XI, 591119 (7 October 2005); doi: 10.1117/12.612719; https://doi.org/10.1117/12.612719
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KEYWORDS
Crystals

Diffraction

Holography

Holograms

Iron

Laser crystals

Diffraction gratings

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