偏振光斯托克斯参量的高速实时测量技术

High-Speed and Real-Time Measurement of Stokes Parameters

为了满足对高速变化的偏振态的测量,提出一种能够对偏振态实现高速测量的技术。阐述了利用1/4波片与起偏器测量偏振光的斯托克斯参量常规的原理和方法,根据高速测量的要求推导出了新的斯托克斯参量计算公式,并依据此公式设计了基于多通道偏振态高速测量的方案,设计了具体的方法并编写了控制与算法程序。测试表明,该系统的测量速度达到了每秒700次偏振态测量,测量速度主要由电子线路的性能决定,测得的结果稳定可靠实现了光纤传输偏振态的高速测量。

To meet the need for measurement of state of polarization （SOP） altering in high speed, a new technology to realize high-speed state of polarization measurement was proposed. A general means of state of polarization measurement using polarizer and quarter wave plate （QWP） was given, and based on this technology new formulas which can both meet the requirement of high-speed and real-time state of polarization measurement are brought out. To validate the feasibility and stability of the new theory, a particular project of experiment is made. The experimental system can perform over 700 polarization measurements per second, the results show that, measuring speed is mainly determined by the performance of the electronic parts and thus the measuring speed can be greatly accelerated by improving electronic parts of the system, the result is also proved to be credible and stable, and the method is useful.