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17 September 2007 Quasi-nonvolatile holographic storage in doubly-doped LiNbO3 crystals
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The recording and readout characteristics in doubly-doped LiNbO3 crystal with one-color scheme are investigated based on jointly solving material equations and coupled-wave equations. Asymmetry between grating buildup and readout process is found when electrons in deep centers can be excited by recording light; the grating is quasi-nonvolatile. The shorter recording wavelength, and dopant in deep centers with a closer energy level to Fe in LiNbO3 crystal, can strengthen such asymmetry. The further investigation shows that two aspects induce the quasi-nonvolatile behavior in doubly-doped LiNbO3 crystal, one is the beam coupling between incident and diffracted beams, the other is two grating form in both centers. This research provides a possible method to prolong the lifetime of grating in doubly-doped LiNbO3 crystals.
© (2007) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Zhifang Chai, De'an Liu, Liren Liu, Ya'nan Zhi, and Dashan Li "Quasi-nonvolatile holographic storage in doubly-doped LiNbO3 crystals", Proc. SPIE 6698, Photonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications, 669815 (17 September 2007);

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