基于LabVIEW的弹光调制型傅里叶变换光谱实时复原  

Real-time restoration of photo-elastic modulation Fourier transform spectrum based on LabVIEW

作　　者：胡将 王志斌 李克武[1,3] 李坤钰 Hu Jiang;Wang Zhibin;Li Kewu;Li Kunyu(Nantong Institute of Intelligent Opto-Mechatronics,North University of China,Nantong 226000,China;College of Instruments and Electronics,North University of China,Taiyuan 030051,China;Academy for Advanced Interdisciplinary Research,North University of China»Taiyuan 030051,China)

机构地区：[1]中北大学南通智能光机电研究院,南通226000 [2]中北大学仪器与电子学院,太原030051 [3]中北大学前沿交叉科学研究院,太原030051

出　　处：《电子测量技术》2021年第10期149-155,共7页Electronic Measurement Technology

基　　金：山西省青年科学基金(201901D211234);山西省自然科学基金(201901D111145)项目资助。

摘　　要：针对弹光调制型傅里叶变换光谱仪难以采集到一个完整周期的激光干涉信号,并且无法对其进行光谱实时复原的问题,设计了基于LabVIEW的弹光调制型傅里叶变换光谱实时复原。首先,选用波长为632.8 nm的氦氖激光器作为光源,经过弹光调制型傅里叶变换光谱仪后,产生随时间变化的干涉信号,然后再通过光电探测器对干涉信号进行转换,获取干涉数据。最后用高速数据采集卡将数据采集下来并传输到LabVIEW上位机,对干涉数据进行光谱复原中的数据处理,并进行波长标定和复原分析。实验表明,对采集的单色激光在上位机LabVIEW能获取到一个完整周期的干涉信号,并经光谱复原算法可以实时复原得到频谱图,复原激光误差小于1 nm,半峰宽为0.01μm。Aiming at the problem that it is difficult for the photo-elastic modulation Fourier transform spectrometer to collect a complete period of laser interference signal and cannot perform the real-time restoration of the spectrum, designs a real-time restoration of the photo-elastic modulation Fourier transform spectrum based on LabVIEW. First, a He-Ne laser with a wavelength of 632.8 nm is selected as the light source. After the incident laser passes through the photo-elastic modulation Fourier transform spectrometer, an interference signal that changes with time is generated, and then the interference signal is converted by a photo-elastic detector to obtain interference data. Finally, use a high-speed data acquisition card to collect the data and transmit it to the LabVIEW host computer, perform data processing in the spectrum restoration of the interference data, and perform wavelength calibration and restoration analysis. Experiments show that LabVIEW can obtain a complete cycle of the interference signal from the collected monochromatic laser on the host computer, and the spectrum restoration algorithm can be used to restore the spectrogram in real time. The error of the restored laser is less than 1 nm, and the half-peak width is 0.01 μm.

关 键 词：数据信号处理 弹光调制型光谱仪 非均匀采样 光谱复原 

分 类 号：TN911.7[电子电信—通信与信息系统]