基于OCDP的保偏光纤偏振模式耦合仿真及实验

Simulation and experiment on polarization mode coupling in PMF based on OCDP

光相干域偏振检测技术广泛应用于保偏光纤中的偏振模式耦合测量和分析。针对保偏光纤中的多点偏振耦合情况,传统的分析方法主要有光路逐点分析和光谱相干矩阵分析,这些方法计算量大且不利于计算机实现。从光波传播特点及宽谱干涉特点出发,研究了保偏光纤中多点偏振耦合的仿真技术和方法,并编写了专用程序进行仿真。利用扫描迈克尔逊实现了多偏振模式耦合的测量,仿真数据与实验吻合。研究表明:通过上述方法能简便、准确地生成多耦合点干涉条纹。从而为保偏光纤中多点偏振模式耦合干涉的测量和分析提供了重要的工具。

Optical Coherence Domain Polarization （OCDP） technology has been widely used to measure the mode coupling in polarization-maintenance fibers （PMF）. The mode coupling is very complex in actual application. Both conventional analysis methods,i.e.the optical path point-by-point and the spectral coherent matrix method, include enormous calculation and are hard to simulate on computer. Based on the properties of light propagation and wide band interference, three laws for the convenience of computer simulation, which are the phase, amplitude and interference laws of polarized output waves, are presented.Through programming the simulation and comparing simulational and experimental results, it is shown that the interference fringe due to the multi-coupling can be efficiently and exactly generated with the above mentioned method.So it provides a powerful tool for the analysis and design of multi-coupling interference in PMF.