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Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator
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Modeling nonlinear phase noise in differentially phase-modulated optical communication systems.

Leonardo D Coelho1, Lutz Molle, Dirk Gross

  • 1Institute for Communications Engineering, Technische Universität München, D-80290 Munich, Germany. leonardo.coelho@tum.de

Optics Express
|March 5, 2009
PubMed
Summary
This summary is machine-generated.

This study introduces a novel method for assessing bit-error rate (BER) in phase-modulated optical systems. The new approach accurately predicts system performance under nonlinear phase noise and dispersion, validated by experiments.

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Area of Science:

  • Optical Communications
  • Nonlinear Optics
  • Signal Processing

Background:

  • Phase-modulated optical communication systems are susceptible to performance degradation.
  • Nonlinear effects like phase noise and dispersion significantly impact signal integrity.
  • Accurate Bit-Error Rate (BER) evaluation is crucial for system design and optimization.

Purpose of the Study:

  • To develop and validate an alternative approach for evaluating the Bit-Error Rate (BER).
  • To investigate the performance of phase-modulated optical communication systems under nonlinear phase noise and dispersion.
  • To provide a reliable numerical and experimental method for system analysis.

Main Methods:

  • Utilized the Karhunen-Loève expansion for numerical analysis.
  • Employed a linearization technique for the Nonlinear Schrödinger Equation (NLSE).
  • Combined numerical simulations with experimental validation.

Main Results:

  • The proposed numerical method accurately models the nonlinear interaction between signal and noise.
  • Numerical results demonstrated strong agreement with experimental data.
  • The study provides an effective alternative for BER evaluation in challenging optical environments.

Conclusions:

  • The developed numerical approach offers a viable alternative for BER assessment in phase-modulated optical systems.
  • The method effectively accounts for nonlinear phase noise and dispersion.
  • Validated numerical and experimental results confirm the approach's reliability.