Nankai University

Taishan Sports Industry Group Co., Ltd.

Shaolin Chen

Jingjun Xu

Yongfa Kong

Baiquan Tang

Hui Huang

Qian Sun

Guangyin Zhang

Shiguo Liu

Hongde Liu

Peiming Xu

Guangao Li

Zhiyong Bian

Xiaojun Chen

Dahuai Zheng

Ling Zhang

Ziheng Huang

A bismuth and magnesium co-doped lithium niobate crystal includes LiCO, NbO, BiOand MgO, wherein the molar ratio of [Li] and [Nb] is 0.90-1.00, the molar percentage of BiOin the mixture is 0.25-0.80%, and the molar percentage of MgO in the mixture is 3.0-7.0%. The bismuth and magnesium co-doped lithium niobate crystal has enhanced photorefraction, improved photorefractive sensitivity, shortened holographic grating saturation writing time, and the photorefractive diffraction efficiency can reach up to 17%. The response time is only 170 ms, when the holographic storage experiment is carried out using 488 nm continuous laser. Therefore, this crystal can be used in the field of holographic imaging.

Bismuth and magnesium co-doped lithium niobate crystal, preparation method thereof and application thereof

This invention relates to the field of materials of the photorefractive crystal. The composition of these crystals is Li Nb O : Fe , M , where M can be magnesium, indium, or zinc; when using q to denote the ion valence of M (q&equals;2 when M is Mg or Zn, and q&equals;3 when M is In), the values of x, y, m, and n are in the range of 0.05&lE;x&lE;0.13, 0.00&lE;y&lE;0.01, 5.0&times;10 &lE;m&lE;7.5&times;10 , and 0.02&lE;qn&lE;0.13. This invention greatly improves the photorefractive properties of LiNbO crystals: makes it have a high diffraction efficiency (more than 68%), a fast response speed for photorefraction (an order of magnitude faster than iron doped LiNbO ), and a high resistance to optical scattering (the light intensity threshold to photorefractive fan scattering near two orders of magnitude larger than LiNbO : Fe). This invention is an excellent three-dimensional optical storage material and has a vast potential market.

Doubly doped lithium niobate crystals

Growing community of inventors

Tianjin, China

Shaolin Chen