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Chinese Optics Letters

Chinese Optics Letters


  • Vol. 7, Iss. 1 — Jan. 1, 2009
  • pp: 67–69

Nonvolatile two-color holographic recording in near-stoichiometric lithium niobate crystals gated by incoherent ultraviolet light

Shaolin Chen, Xiangming Liu, Bo Fu, and Guoquan Zhang  »View Author Affiliations

Chinese Optics Letters, Vol. 7, Issue 1, pp. 67-69 (2009)

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Nonvolatile two-color holographic recording gated by incoherent ultraviolet (UV) light centered at 365 nm is investigated in near-stoichiometric lithium niobate crystals. The influence of thermal treatment on the two-color recording is studied. The results show that thermal reduction tends to improve the two-color recording performance, whereas thermal oxidation degrades the two-color recording. With an incoherent 0.2-W/cm2 UV gating light and a 0.25-W/cm2 semiconductor recording laser at 780 nm, a two-color recording sensitivity of 4\times10^{-3} cm/J and a recording dynamic range characterized by M/# of 0.12 are achieved in a 2.2-mm thermally reduced near-stoichiometric lithium niobate crystal. We attribute the improvement to the prolonged lifetime of small polarons and the increased absorption at the gating wavelength due to thermal reduction.

© 2009 Chinese Optics Letters

OCIS Codes
(090.2900) Holography : Optical storage materials
(160.2900) Materials : Optical storage materials
(160.5320) Materials : Photorefractive materials
(210.2860) Optical data storage : Holographic and volume memories

Shaolin Chen, Xiangming Liu, Bo Fu, and Guoquan Zhang, "Nonvolatile two-color holographic recording in near-stoichiometric lithium niobate crystals gated by incoherent ultraviolet light," Chin. Opt. Lett. 7, 67-69 (2009)

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