Pam-n—fundamental limits in chromatic dispersive-uncompensated channels

Er’El Granot, Gilad Katz

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


The fundamental chromatic dispersion limit for an optical communication N-level pulse amplitude modulation (PAM-N) format without any dispersion compensating module is calculated. The main result of this analysis shows that in a non-dispersion-compensated channel, the product β2B2L (where β2, L, and B are the dispersion coefficient, fiber length, and the Baud rate, respectively) is bounded by a number, which depends only on the number of levels N. In particular, β2B2L < 0.318, β2B2L < 0.212, and β2B2L < 0.14 for N values of 2, 4, and 8, respectively. Moreover, an analytical expression for a noisy channel’s power penalty was formulated. This analytic expression shows high agreement with numerical simulations. To the best of our knowledge, this is the first time that such a fundamental limit has been formulated for PAM-N systems.

Original languageEnglish
Article number2542
JournalApplied Sciences (Switzerland)
Issue number6
StatePublished - 2 Mar 2021
Externally publishedYes


  • Data center
  • Fiber dispersion limitation
  • PAM

ASJC Scopus subject areas

  • General Materials Science
  • Instrumentation
  • General Engineering
  • Process Chemistry and Technology
  • Computer Science Applications
  • Fluid Flow and Transfer Processes


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