T. Schafer

Publications (3)6.46 Total impact

• Article: Optimization of dispersion-managed optical fiber lines

  T. Schafer, E.W. Laedke, M. Gunkel, C. Karle, A. Posth, K.H. Spatschek, S.K. Turitsyn
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  ABSTRACT: We present various approaches to the optimization of optical fiber lines and discuss the ranges of validity of such methods. An effective scheme for upgrading of existing transmission lines using dispersion-management with optimization of the pre- and post-compensating fiber is examined. The theory and numerical methods are illustrated in application to the upgrade of a specific installed Deutsche Telekom fiber line
  Journal of Lightwave Technology 07/2002; 20(6):946-952. · 2.78 Impact Factor
• Article: Generalized root-mean-square momentum method to describe chirped return-to-zero signal propagation in dispersion-managed fiber links

  S.K. Turitsyn, T. Schafer, V.K. Mezentsev
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  ABSTRACT: We present a generalized momentum method to describe evolution of the root-mean-square (rms) (averaged over time) optical pulse characteristics in dispersion-managed fiber lines. A closed system of the ordinary differential equations is derived for the rms pulse power, width, and chirp. The developed method can be useful for massive numerical simulations required to optimize wavelength-division-multiplexing dispersion-managed transmission using chirped return-to-zero format.
  IEEE Photonics Technology Letters 03/1999; · 2.19 Impact Factor
• Source

  Available from: Vladimir Mezentsev

  Article: Path-averaged chirped optical soliton in dispersion-managed fiber communication lines

  S K Turitsyn, T Schafer, K H Spatschek, V K Mezentsev
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  ABSTRACT: We present a comprehensive path-average theory of dispersion-managed DM optical pulse. Applying complete basis of the chirped Gauss-Hermite orthogonal functions, we derive a path-average propagation equation in the time domain and present an analytical description of the breathing dynamics of the chirped DM soliton. This theory describes both self-similar evolution of the central, energy-containing core and accompanying nonstationary oscillations of the far-field tails of an optical pulse propagating in a fiber line with an arbitrary dispersion map. In the case of a strong dispersion management the DM soliton is well described by a few modes in this expansion, justifying the use of a Gaussian trial function in the previously developed variational approach. Suggested expansion in the basis of chirped Gauss-Hermite functions presents a regular way to describe soliton properties for arbitrary dispersion map and to account for the effect of practical perturbations Ž . filters, gratings, noise an so on on the dynamics of the ideal DM soliton. We also present path-averaged propagation model in the spectral domain that could be useful for multichannel transmission applications. Theoretical results are verified by numerical simulations. q 1999 Published by Elsevier Science B.V. All rights reserved.
  Optics Communications 01/1999; 163:122-158. · 1.49 Impact Factor