Optimum PCF tapers for blue-enhanced supercontinuum sources

Uffe Visbech Møller (Invited author), Simon Toft Sørensen (Invited author), Casper Larsen (Invited author), Peter M. Moselund (Invited author), Christian Jakobsen (Invited author), Jeppe Johansen (Invited author), Carsten L. Thomsen (Invited author), Ole Bang (Invited author)

Research output: Contribution to journalJournal articlepeer-review


Tapering of photonic crystal fibers has proven to be an effective way of blueshifting the dispersive wavelength edge of a supercontinuum spectrum down in the deep-blue. In this article we will review the state-of-the-art in fiber tapers, and discuss the underlying mechanisms of supercontinuum generation in tapers. We show, by introducing the concept of a group-acceleration mismatch, that for a given taper length, the downtapering section should be as long as possible to enhance the amount of blueshifted light. We also discuss the noise properties of supercontinuum generation in uniform and tapered fibers, and we demonstrate that the intensity noise at the spectral edges of the generated supercontinuum is at a constant level independent on the pump power in both tapered and uniform fibers.
Original languageEnglish
JournalOptical Fiber Technology
Issue number5
Pages (from-to)304–314
Publication statusPublished - 2012

Bibliographical note

Invited paper.


  • Supercontinuum generation
  • Photonic crystal fibers
  • Nonlinear fiber optics
  • Relative intensity noise
  • Tapered fibers
  • Group-acceleration mismatch


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