报导一种新的非线性光学材料——磷酸水杨酸二钠(简称DSS)晶体,用水溶液降温法得到光学质量优良的大单晶。X射线衍射法测定晶体属正交晶系,点群为mm2。透射光谱在370～1300nm范围内,测量了不同波长的主折射率和有效倍频系数。计算出相位匹配角φⅠ,φⅡ,得到DSS晶体相对于KDP晶体d(36)的d(31)和d(32)值。倍频效率约为KDP晶体的3.5倍,光损伤阈值大于200MW/cm~2。晶体的抗潮解性能比KDP型晶体稍好,所以用DSS晶体制作1.06μ激光器的倍频元件有一定的使用价值.

A new nonlinear optical crystal^ disodium sulfosaiicylaLe (DSB) is reported. Large single crystal with good optical quality have been grown in soluiion by the cooling method. X-ray structural determination shows that the crystal belongs to orthorhombio system with poini group mm 2. Its transmitted spectrum is in the range of 870~ 1300 nm. The refractive indices ai various wavelengths as well as the effeoiive nonlinear coefficients dm have been measured. Based on the oalculafcion of the phase-ma tching angles φι and φπ, the values of t/3i and. d32 of DSS crystal relative to of KDP crystal have been obtained. It is found, thai the SHG conversion efficiency of DSS crystal is about 3.5 times than ihai of KDP crystal. Moreover, the optical damage threshold is higher than 200 MW/om2. The crystal exhibits a somewhat better deliquescent resistant proper ty than the KDP crystal. is believed thai this crystal has some practical values of using as the SHG element for 1.06 μ laser.