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13 - Nonlinear crosstalk in fiber OPAs

Published online by Cambridge University Press:  23 March 2010

Michel E. Marhic
Michel E. Marhic
Affiliation:
University of Wales, Swansea
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Summary

Introduction

Fiber OPAs have a number of features that are potentially attractive for optical communication systems. In particular there is the prospect of using amplifiers with several hundred nanometers of gain bandwidth for the construction of wavelength-division multiplexing (WDM) systems with tens of terabits per second of capacity. However, before this potential can be realized a number of effects that can degrade the signal-to-noise ratio (SNR) must be addressed. Specifically these effects are: cross-gain modulation, mediated via pump depletion; four-wave mixing (FWM) between signals or between signals and a pump; cross-phase modulation (XPM) between signals. The physical origin of these effects is simple: efficient OPA operation generally requires that all the waves of interest be close to the zero-dispersion wavelength (ZDW) of the fiber, and this in turn implies that a number of other unwanted nonlinear interactions will also be well phase matched and so may generate large undesired effects. This origin indicates that these effects are fundamental in nature and may therefore be difficult to suppress.

Because of the importance of this issue, these effects have been investigated in depth by several research groups [1–12]. It has been found, through simulations and experimentally, that some of these effects can indeed be quite large under certain circumstances, to the point where they bring into question the viability of using fiber OPAs in WDM communication systems.

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Fiber Optical Parametric Amplifiers, Oscillators and Related Devices , pp. 281 - 302
Publisher: Cambridge University Press
Print publication year: 2007

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References

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  • Nonlinear crosstalk in fiber OPAs
  • Michel E. Marhic, University of Wales, Swansea
  • Book: Fiber Optical Parametric Amplifiers, Oscillators and Related Devices
  • Online publication: 23 March 2010
  • Chapter DOI: https://doi.org/10.1017/CBO9780511600265.013
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  • Nonlinear crosstalk in fiber OPAs
  • Michel E. Marhic, University of Wales, Swansea
  • Book: Fiber Optical Parametric Amplifiers, Oscillators and Related Devices
  • Online publication: 23 March 2010
  • Chapter DOI: https://doi.org/10.1017/CBO9780511600265.013
Available formats
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Save book to Google Drive

To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Google Drive.

  • Nonlinear crosstalk in fiber OPAs
  • Michel E. Marhic, University of Wales, Swansea
  • Book: Fiber Optical Parametric Amplifiers, Oscillators and Related Devices
  • Online publication: 23 March 2010
  • Chapter DOI: https://doi.org/10.1017/CBO9780511600265.013
Available formats
×