The grating non-uniformity of the nonvolatile volume hologram recording in doubly doped LiNbO_3(LN) crystals mainly caused by strong ultraviolet (UV) absorption is studied in detail.

• 研究了非挥发全息记录中由于紫外光的强吸收而引起的光栅非均匀性,分析了这种非均匀性对光栅衍射效率的影响。结果显示,非均匀性致使光折变光栅的平均强度减弱,衍射效率降低。