Tu Chao-yang, Zhu Zhao-jie, Li Jian-fu, Wang Yan, You Zhen-yu, Wu Bai-chang
Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China.
Guang Pu Xue Yu Guang Pu Fen Xi. 2005 Jun;25(6):804-7.
Cr3+:Al2(WO4)3 Crystal was grown from the Na2WO4 solvent system by using the TSSG method. The absorption spectrum shows that there are two strong absorption wideband peaks and one we ak absorption peak belonging to Cr3+ ion in the crystal. The peak values of two strong absorption wideband peaks are at 422 and 595 nm, respectively. The values of two weak absorption peaks are at 684 and 663 nm, respectively. The fluorescence spectrum shows that one emission wideband peak ranging from 650 to 820 nm coexists with one stronger emission peak at 680 nm. The peak value of emission wideband is at 740 nm. The crystal field and Racah parameters were calculated, where Dq/B = 2.420 indicates that it has an intermediary crystal field. The result shows that Cr3+:Al2(WO4)3 crystal is promising for tunable laser because it not only has the spectral characteristics required for tunable laser crystal but also has the good physicochemical properties.
采用顶部籽晶溶液生长法（TSSG法）从Na2WO4溶剂体系中生长出Cr3+：Al2(WO4)3晶体。吸收光谱表明，晶体中存在两个强吸收宽带峰和一个属于Cr3+离子的弱吸收峰。两个强吸收宽带峰的峰值分别位于422和595nm处。两个弱吸收峰的值分别位于684和663nm处。荧光光谱表明，一个范围从650到820nm的发射宽带峰与一个位于680nm处的较强发射峰共存。发射宽带的峰值位于740nm处。计算了晶体场和拉卡参数，其中Dq/B = 2.420表明它具有中间晶体场。结果表明，Cr3+：Al2(WO4)3晶体有望用于可调谐激光器，因为它不仅具有可调谐激光晶体所需的光谱特性，而且具有良好的物理化学性质。
