Bessel光束的重建特性对于粒子多层面操控具有特殊意义.依据Hankel波理论,分析了无衍射Bessel光束的产生及重建原理,系统地对轴上圆形障碍物、方形障碍物和离轴圆形障碍物进行了详细论述.利用光学设计软件ZEMAX对轴棱锥产生Bessel光束经过各种障碍物的重建现象进行了系统的模拟仿真.对建立的仿真模型进行实验验证,实验结果与模拟仿真符合得很好.结果表明ZEMAX软件可以对轴棱锥产生Bessel光束的重建特性进行灵活直观的建模仿真,且仿真结果具有很高的准确性.
According to the perturbation theory, the theory of self-phase compensation is developed for the optical waveguide isolator based on the TE-TM mode conversion. The operation principle of such a device is explained in terms of synchronization of phase and power conversion. The effect of balancing phase mismatches of the two convertors on achieving a proper percentage of mode conversion is revealed. The simulation results confirm the self-phase compensation theory.