激光线性扫频法快速标定法布里-珀罗标准具参数

法布里-珀罗标准具是一种精密的光学仪器,其光谱窄、精细度高,广泛应用于精细距离的测定、信号的检测分析等。标准具其自身参数的快速测量和准确标定成为诸多光学研究必不可少的步骤。针对法布里-珀罗标准具参数测量,设计快速标定实验方案,采用窄线宽(线宽1 kHz)激光光源,数字示波器采用泰克DPO4104B(1 GHz,5 GS/s)进行采样存储,直接利用屏幕图像测试并计算标准具的主要参数指标。准确标定了所测法布里-珀罗标准具的自由谱宽、半高全宽、精细度、品质因数以及扫频常数,比较分析了两种不同测试方案所得到结果。为开展法布里-珀罗标准具参数的快速准确标定提供技术参考。

Fast calibration parameters of Fabry-Perot etalon by laser linear frequency sweep

Fabry-Perot etalon is a precision optical instrument. Due to its narrow spectrum and high fineness, it is widely used in measuring the fine distance, signal detection and analysis and so on. Therefore, the quick measurement and accurate calibration of parameters of Fabry-Perot etalon has become very important in numerous optical research and accurate calibration steps. To aim at the parameters measurement of the Fabry-Perot etalon, the experimental calibration scheme was designed and the narrow linewidth laser (linewidth1 kHz) was used. Moreover, the high-performance digital oscilloscope DPO4104B(1 GHz, 5 GS/s) was applied to directly test and calculate the parameters of etalon. This paper accurately calibrated the free spectral range, the full width at half maximum, the fineness, quality factor and the sweeping constant of the etalon. At last, two results of different schemes were compared. This paper can provide relevant technical reference for the fast and accurate parameters calibration of Fabry-Perot etalon.