Analysis of W-type waveguide for Nd-doped fiber laser operating near 940 nm

Seongwoo Yoo, Daniel B.S. Soh, J. Kim, Y. Jung, J. Nilsson, J. K. Sahu, Jhang W. Lee, K. Oh

Research output: Contribution to journalArticlepeer-review

33 Citations (Scopus)


We propose a three-layered W-type structure for laser fiber to facilitate the three-level radiative transition near 940 nm region of Nd ion, while suppressing the competing four-level transition near 1060 nm by introducing a novel highly wavelength selective loss mechanism. In order to achieve a net gain around 940 nm, requirements in fiber waveguide parameters for the LP 01 mode cut-off and bending loss were theoretically investigated. The waveguide designs were experimentally confirmed generating stable CW single mode output power of 705 mW.

Original languageEnglish
Pages (from-to)153-162
Number of pages10
JournalOptics Communications
Issue number1-3
Publication statusPublished - 2005 Mar 1

Bibliographical note

Funding Information:
This work was supported by the Brain Korea-21 Information Technology Project, Ministry of Education, Korea.

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering


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