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Analysis of performance optimization in supercontinuum sources.

Jian Zhao1, Lian-Kuan Chen, Chun-Kit Chan

  • 1Department of Information Engineering, Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China. jzhao2@ie.cuhk.edu.hk

Optics Letters
|March 10, 2004
PubMed
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Performance variations in supercontinuum (SC) sources are caused by noise evolution in normal-dispersion fiber. High-order nonlinearity, dispersion, self-steeping, four-wave mixing, and Raman scattering contribute to spectral noise asymmetry.

Area of Science:

  • Nonlinear optics
  • Fiber optics
  • Quantum optics

Background:

  • Supercontinuum (SC) sources are crucial for various applications.
  • Understanding performance variations in SC sources is essential for optimizing their use.
  • Noise evolution significantly impacts SC source performance.

Purpose of the Study:

  • To determine the cause of performance variation in SC sources.
  • To analyze noise evolution in SC generation within normal-dispersion fiber.
  • To investigate the role of high-order nonlinearity in SC noise dynamics.

Main Methods:

  • Numerical analysis of noise evolution in SC generation.
  • Inclusion of high-order nonlinearity in the analysis.
  • Evaluation of spectrally sliced pulse quality at different stages.

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Main Results:

  • Noise evolution in SC fiber occurs in two stages.
  • Dispersion governs initial noise, while self-steeping causes spectral asymmetry.
  • Four-wave mixing and Raman scattering further generate and augment noise asymmetry.

Conclusions:

  • High-order nonlinearity plays a significant role in SC noise evolution.
  • The identified noise mechanisms explain performance variations in SC sources.
  • An asymmetric profile of sliced-pulse quality versus frequency was observed.