基于STC单片机F-P扫描干涉仪的设计

通过分析F-P扫描干涉仪的工作原理,基于STC89C52RC单片机,采用PA93功率放大器驱动压电陶瓷,设计了1 064nm平平腔结构的F-P扫描干涉仪。腔镜反射率为98%,精细度156,腔长0.1~100mm连续可调,对应自由光谱区1.5~1 500GHz和分辨率9.65~9 650MHz。压电陶瓷驱动电压和频率通过4×4矩阵键盘,可以在0~200V和1~30Hz连续可调,显示在1 602液晶屏上。同时可以通过RS232串口与计算机通讯,在上位机使用LabVIEW软件界面方便地设置压电陶瓷驱动电压和频率。最后使用该F-P扫描干涉仪,对激光二极管泵浦Nd:YVO4激光器纵模进行了测量,验证了整个系统的工作性能。

Study of F-P Scanning Interferometer Based on STC Single-Chip Microcomputer

A planar-planar 1064 nm FP scanning interferometer is designed based on STC89C52RC single-chip microcomput- er. Its principle is analyzed using MATLAB software. PA93 power amplifier is used to drive PZT. The reflectivity of the mirror is 98~, corresponding to the fineness of 156. The length of the cavity can be adjusted continuously and is set to be 0. 1--100 ram, corresponding to the free spectrum of 1.5--1 500 GHz and resolution of 9.65~9 650 MHz. The voltage and frequency of the PZT can also be adiusted continuously by 4~4 matrix keyboard setting to be 0~200 V and 1--30 Hz which are displayed on the 1602 LCD. The PZT driver can communicate with computer by RS232 serial port, and the voltage and frequency of the PZT can also be adjusted continuously by LabVIEW software. The longitudinal mode of a diode-pumped Nd：YVO4 laser is inspected to verify the system working well at last.