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Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator
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A simplified model for nonlinear cross-phase modulation in hybrid optical coherent system.

Zhenning Tao1, Weizhen Yan, Shoichiro Oda

  • 1Fujitsu R&D Center, Ocean International Center, Beijing 100025, China. taozn@cn.fujitsu.com

Optics Express
|August 6, 2009
PubMed
Summary

A simplified model simplifies cross-phase modulation (XPM) analysis in dense wavelength division multiplexing (DWDM) systems by reducing distributed effects to lumped phase modulation, aiding XPM noise understanding.

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Area of Science:

  • Optical communications
  • Nonlinear optics

Background:

  • Cross-phase modulation (XPM) poses significant challenges in optical coherent dense wavelength division multiplexing (DWDM) systems.
  • Accurate analysis of XPM is crucial for system performance optimization.

Purpose of the Study:

  • To develop a simplified model for analyzing XPM in optical coherent DWDM systems.
  • To facilitate the understanding and mitigation of XPM-induced noise.

Main Methods:

  • A simplified model was proposed, reducing distributed XPM to lumped phase modulation.
  • XPM phase noise was modeled using a linear system driven by undistorted pump channel intensities.
  • Model limitations from approximations were discussed and verified through simulations and experiments.

Main Results:

  • The simplified model accurately represents XPM phenomena in typical hybrid optical coherent systems.
  • The model demonstrated good agreement with simulation and experimental results.
  • Various XPM effects were successfully explained using the proposed model.

Conclusions:

  • The simplified lumped model provides an effective tool for analyzing XPM in DWDM systems.
  • This model aids in understanding the impact of XPM on system performance.
  • The approach offers a valuable method for predicting and managing XPM-induced phase noise.