摘要
设计了一种三波片型偏振态发生器(PSG),分析PSG的结构特点,导出了Stokes参量的变换关系。基于禁忌搜索(Tabu Search,TS)算法原理,提出了一种既能实现偏振态的快速变换又能降低晶体两端电压的控制算法。仿真结果表明,采用该控制算法,PSG能够将输入的线偏光转换为任意偏振光,绝对精度可达0.07%。如果把Stokes参量S2和S3限定在Poincare球的特定区域内,通过该控制算法可产生所需的偏振态并保证控制电压大小在120 V以内。最后,通过实验验证该算法能够满足单光束连续变量相干光通信编码的需要。
A three-plate-type polarization state generator （PSG） was designed and the transformation of Stokes parameters was derived according to the structure characteristics of PSG. Based on the principle of Tabu Search （referred to as TS） algorithm, a control algorithm was proposed which was able to not only achieve the rapid transformation between the polarization states but also reduce the bias-voltage across the crystal. The simulation results show that, by using this control algorithm, the PSG can transform the linear polarization into arbitrary polarization and the precision can arrive to 0.07%. If the Stokes parameter S2 and S3 were restricted to the specific region on the Poincare sphere, the desired polarization state was generated by this control algorithm and the control voltage amplitude was ensured within 120 V. Last, the experimental results show that, this control algorithm could satisfy the requirement of encoding in continuous variables coherent optical communication of single beam.
出处
《红外与激光工程》
EI
CSCD
北大核心
2015年第1期195-200,共6页
Infrared and Laser Engineering
基金
国家自然科学基金(61177072)
