Polarization-Independent Receivers for Low-Cost Coherent OOK Systems

  title={Polarization-Independent Receivers for Low-Cost Coherent OOK Systems},
  author={Ernesto Ciaramella},
  journal={IEEE Photonics Technology Letters},
We demonstrate analytically a novel scheme to obtain polarization-independent operation in low-cost coherent OOK receivers, suitable for access networks. We move from a well-known phase-diversity receiver, exploiting a 3 × 3 coupler, three photodiodes, and basic analogue processing. If that receiver is modified to inject the local oscillator (or the signal) into two inputs with proper polarization states, we show, by both mathematical derivation and numerical simulations, that the resulting… CONTINUE READING
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