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Proceedings Paper

Light erasing method for fabricating planar waveguide volume holographic gratings in LiNbO3:Fe crystal
Author(s): Dexing Yang; Haibin Wang; Jianlin Zhao; Xiaoli Wu; Rongguang Tong
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Paper Abstract

The fabrication of volume holographic gratings (VHGs) has been investigated for many years. According to the photorefractive properties of LiNbO3:Fe crystal, the VHGs with the grating vector normal to c-axis of the crystal are obtained hardly. A new method for fabrication of above gratings in the planar waveguide array (PWA) in LiNbO3:Fe crystal based on the light erasing effect is presented. This light erasing technique is divided into two steps: the fabrication of PWA and the light recording of VHGs in the PWA. A PWA is formed firstly in the LiNbO3:Fe crystal through interference field of two red laser beams. The alignment direction of the formed PWA is parallel to c-axis of crystal. Then the VHGs are recorded using periodical erasing to the formed PWA by the bright fringes of interference, here the vector of the kind of gratings can be perpendicular to c-axis of LiNbO3:Fe crystal. Furthermore, the VHGs with the period of micron order are created in a PWA employing the light erasing method. The experiment results demonstrate that the light erasing method for fabricating VHGs with the grating vector perpendicular to c-axis in LiNbO3 crystal is feasible.

Paper Details

Date Published: 9 June 2006
PDF: 7 pages
Proc. SPIE 6149, 2nd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies, 61492Z (9 June 2006); doi: 10.1117/12.674302
Show Author Affiliations
Dexing Yang, Northwestern Polytechnical Univ. (China)
Haibin Wang, Northwestern Polytechnical Univ. (China)
Jianlin Zhao, Northwestern Polytechnical Univ. (China)
Xiaoli Wu, Northwestern Polytechnical Univ. (China)
Rongguang Tong, Northwestern Polytechnical Univ. (China)


Published in SPIE Proceedings Vol. 6149:
2nd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies
Li Yang; Shangming Wen; Yaolong Chen; Ernst-Bernhard Kley, Editor(s)

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