Nonvolatile holographic gratings in doubly doped LiNbO3

Liren Liu; Dean Liu; Liyong Ren; Changhe Zhou; Ye Liu

doi:10.1364/DOMO.2002.DTuA4

Diffractive Optics and Micro-Optics
OSA Trends in Optics and Photonics Series (Optica Publishing Group, 2002),
paper DTuA4
•https://doi.org/10.1364/DOMO.2002.DTuA4

Nonvolatile holographic gratings in doubly doped LiNbO₃

Liren Liu, Dean Liu, Liyong Ren, Changhe Zhou, and Ye Liu

Diffractive Optics and Micro-Optics 2002

Tucson, Arizona United States
3–6 June 2002
ISBN: 1-55752-710-5

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Applications: II (DTuA)

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L. Liu, D. Liu, L. Ren, C. Zhou, and Y. Liu, "Nonvolatile holographic gratings in doubly doped LiNbO3," in Diffractive Optics and Micro-Optics, R. Magnusson, ed., Vol. 75 of OSA Trends in Optics and Photonics Series (Optica Publishing Group, 2002), paper DTuA4.

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Abstract

The photochromic effect, bleaching effect and no-sensitization effect are observed in four doubly doped LiNbO₃ crystals of the same doping system of Fe:Mn, Ce:Mn, Ce:Cu and Fe:Cu. A two-step and a three-step recording/fixing schemes are proposed to record nonvolatile photorefractive holographic gratings for these different effects. The basic idea is to use two red laser beams and an ultraviolet illumination selectively for the writing of charge grating in shallower centers, the developing of charge grating in deeper centers by transferring the grating in shallower centers and the fixing of only the grating in deeper centers for nonvolatile read-out. The experimental results and a corresponding comparison are given.

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