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

作者：Chen Shaolin^*; Liu Xiangming; Fu Bo; Zhang Guoquan

来源：Chinese Optics Letters, 2009, 7(1): 67-69.

DOI：10.3788/COL20090701.0067

Nonvolatile two-color holographic recording gated by incoherent ultraviolet (UV) light centered at 365 rim 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/cm(2) UV gating light and a 0.25-W/cm(2) semiconductor recording laser at 780 nm, a two-color recording sensitivity of 4 x 10(-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.

• 出版日期2009-1-10
• 单位南开大学; 中国工程物理研究院流体物理研究所; 中国工程物理研究院