W-type fiber design for application in U- and S-band amplifiers by controlling the LP 01 mode long wavelength cut-off

Seongwoo Yoo, Yongmin Jung, Junki Kim, Jhang W. Lee, Kyunghwan Oh

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3 Citations (Scopus)


We propose a novel passive band-pass filtering scheme to obtain a net gain in a band-competing system using a W-type fiber waveguide, slicing a shorter wavelength gain band out of a given stimulated emission cross-section. By controlling the location of the LP 01 mode cut-off, fiber design parameters are presented for obtaining a U-band gain from Tm ions and S-band from Er ions. The tolerance of the LP 01 mode cut-off wavelength and the accompanying bending loss are theoretically analyzed in terms of waveguide parameters.

Original languageEnglish
Pages (from-to)332-345
Number of pages14
JournalOptical Fiber Technology
Issue number4
Publication statusPublished - 2005 Oct 1


All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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