Principal modes in multimode fibers: exploring the crossover from weak to strong mode coupling.

  title={Principal modes in multimode fibers: exploring the crossover from weak to strong mode coupling.},
  author={Wen Xiong and Philipp Ambichl and Yaron Bromberg and Brandon Redding and Stefan Rotter and Hui Cao},
  journal={Optics express},
  volume={25 3},
We present experimental and numerical studies on principal modes in a multimode fiber with mode coupling. By applying external stress to the fiber and gradually adjusting the stress, we have realized a transition from weak to strong mode coupling, which corresponds to the transition from single scattering to multiple scattering in mode space. Our experiments show that principal modes have distinct spatial and spectral characteristic in the weak and strong mode coupling regimes. We also… CONTINUE READING

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