Phase and group modal birefringence of triple-defect photonic crystal fibers

Research output: Contribution to journalArticlepeer-review


  • Francis Berghmans
  • M. Antkowiak
  • R. Kotynski
  • T. Nasilowski
  • P. Lesiak
  • J. Wojcik
  • W. Urbanczyk
  • H. Thienpont

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We discuss the phase and group modal birefringence in photonic crystal fibres (PCFs) with an elongated core. Owing to large from birefringence, these two types of birefringence in such PCFs may not only have opposite signs, but their absolute value can also differ by several orders of magnitude. We also show that PCFs offer the unique poosibility of having a large phase birefringence and a negligible polarization mode dispersion at the same time. Using a fully vectorial mode solver, we show how these parameters can be tailored by a proper choice of geometry of the PCF. We demonstrate both numerically and experimentally the strong wavelength dependence of phase and group modal birefringence in triple-defect photonic crystal fibres (PCFs).


Original languageEnglish
Pages (from-to)763-766
JournalJournal of Optics A: Pure and Applied Optics
Publication statusPublished - 2005


  • photonic crystal fibres, polarization, birefringence

ID: 305343