论文部分内容阅读
采用水热法生长出了深紫外非线性光学晶体Rb Be2BO3F2。通过优化晶体生长温度、矿化剂等条件生长出了尺寸为27.0 mm×14.0 mm×5.7 mm的大尺寸晶体。通过粉末X射线衍射仪(XRD)确认了晶体物相未因水热晶体生长而发生改变。比较研究了熔盐法RBBF(F-RBBF),KBBF(L-KBBF)和水热法RBBF(H-RBBF)倍频产生400 nm激光的性能:表征了生长晶体的紫外可见透过光谱、粉末倍频能力和晶体800 nm倍频产生400 nm激光的性能。透过光谱显示在190~800 nm无明显吸收峰,透过率接近85%,与熔盐法晶体相当。粉末的倍频(SHG)强度与同条件下熔盐法晶体粉末相当。Rb2CO3矿化剂体系生长的RBBF晶体的800~400 nm倍频输出功率相比熔盐法KBBF要低,且没有随着厚度增加而增大。Rb F矿化剂体系生长的晶体800~400 nm倍频输出功率与熔盐法KBBF和RBBF相当。然而与熔盐法KBBF相比,水热法KBBF输出功率却非常低。综上,水热RBBF的800 nm基频光倍频产生400 nm光的能量与熔盐法KBBF和RBBF在相当的水平,远高于大多数水热法KBBF晶体。结果表明水热生长的Rb Be2BO3F2晶体具有与熔盐法晶体相当的非线性光学性能,在深紫外非线性光学领域有较好的应用前景。
The deep UV nonlinear optical crystal Rb Be2BO3F2 was grown by hydrothermal method. By optimizing the crystal growth temperature, mineralizing agent and other conditions to grow a large size of 27.0 mm × 14.0 mm × 5.7 mm crystal. It was confirmed by the powder X-ray diffractometer (XRD) that the crystal phase did not change due to the hydrothermal crystal growth. The performance of the 400 nm laser generated by the double melting of RBBF (F-RBBF), KBBF (L-KBBF) and hydrothermal RBBF (H-RBBF) was studied. The UV- Multiplier capability and crystal 800 nm multiplier produce 400 nm laser performance. The spectrum shows no obvious absorption peak at 190-800 nm, the transmittance is close to 85%, which is equivalent to that of the molten salt method. The frequency doubled (SHG) strength of the powder is equivalent to the molten salt crystal powder under the same conditions. The RBBF crystal grown from Rb2CO3 mineralizer has 800 ~ 400 nm frequency doubling output power, which is lower than that of the molten salt method KBBF and does not increase with the increase of thickness. Rb F mineralizer system crystal 800 ~ 400 nm multiplier output power and molten salt method KBBF and RBBF quite. However, compared with the molten salt method KBBF, hydrothermal KBBF output power is very low. In conclusion, the energies at 400 nm generated by the 800 nm fundamental frequency doubling of the hydrothermal RBBF are comparable to the KBBF and RBBF of the molten salt method, much higher than that of most hydrothermal KBBF crystals. The results show that the hydrothermal grown Rb Be2BO3F2 crystals have the same nonlinear optical properties as those of the molten salt crystals and have good application prospects in the deep ultraviolet nonlinear optics.