针对Z扫描实验系统数据量大、稳定性要求高以及数据处理的实际需要, 设计了一种基于LabVIEW和MATLAB混合编程的全自动激光Z-scan测量系统, 用以表征样品非线性光学特性。运用LabVIEW2012开发平台, 实现对实验系统测量的全自动控制, 通过在LabVIEW环境中的MATLAB Script节点直接调用MATLAB数值分析程序, 实现对实验数据的自动拟合, 从而直接得到非线性光学系数。通过标准样品CS2的定标测试, 测得三阶非线性折射率系数与已报道数据相符, 且测量过程迅速。实验表明, 该系统利用LabVIEW和MATLAB软件的优势互补, 简化了繁琐的手动操作, 成功实现了Z-scan系统的自动测量和数据处理的整合, 提高了测量的准确性和效率。

A mixed-language programming full automatic laser Z-scan measurement system based on LabVIEW and MATLAB is designed to express nonlinear optical features of samples. Full automatic control of experimental system measurement is realized using LabVIEW2012 development platform. MATLAB data analysis program is directly called through MATLAB Script node in LabVIEW environment so as to fit experimental data automatically and the nonlinear optical coefficient is obtained directly. Based on the calibration test of standard sample CS2, the measured third-order nonlinear refraction coefficient accords with the reported data, and the measurement process is rapid. Experimental results show that the complex manual operation is simplified by the system, automatic measurement of Z-scan system and integration of data processing are realized successfully. And the accuracy and efficiency of the measurement are improved.