基于3×3耦合器的非平衡光纤Mach-Zehnder干涉仪传输特性研究

Research on delivering characteristic of unbalanced fiber Mach-Zehnder interferometer based 3×3 coupler

研究了一般条件下基于3×3耦合器的非平衡光纤Mach-Zehnder干涉仪的传输特性。运用波导耦合理论和光纤偏振光传输理论,通过推导,得到干涉仪输出光强、可见度以及相位噪声的表达式,分析了干涉仪三路输出光强之间的相互关系,以及可见度、相位噪声与干涉仪输入光偏振态之间的关系。

The transmission characteristic of unbalanced fiber Mach-Zehnder interferometer based on 3×3 coupler is investigated in this paper.With the coupling theory and the optical wave-guide theory,the interferometer output expression,fringe visibility expression and phase noise expression are obtained.The correlation in the three output of interferometer is theoretically proved.At the same time,the relationship between the fringe visibility of interferometer,phase noise and polarization of the input light are also analysed.