Raman oscillation with intracavity pumping of a fibre laser

Stuart D. Jackson*

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

We introduce the concept of cascaded resonant Raman pumping of fibre lasers. The pump scheme utilises the relatively large intracavity Stokes field that is generated within a Raman fibre laser to excite a lanthanide ion that is doped within the core of the fibre providing the Raman gain. In order to illustrate the general characteristics of the pump method and, to establish the design parameters necessary for the realisation of the pump scheme, calculations from a theoretical model that is used to simulate the generation of laser output from a fibre laser that is resonantly pumped with first Stokes radiation is presented. Specifically, the 2.1 μm output from a Ho3+-doped silica fibre laser that is pumped with 1.15 μm first Stokes radiation is calculated with the use of a relatively simple numerical model. For a launched pump power of 20 W at 1.07 μm, a fibre laser output of ∼3 W is predicted for a nominal intrinsic loss of 1.5 dB/km at 2.1 μm, however, this low value of the intrinsic loss at 2.1 μm can be significantly relaxed when the length of the Ho3+-doped silica fibre laser resonator is made considerably shorter than the Stokes resonator.

Original languageEnglish
Pages (from-to)285-289
Number of pages5
JournalOptics Communications
Volume190
Issue number1-6
DOIs
Publication statusPublished - 1 Apr 2001
Externally publishedYes

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Keywords

  • Fibre laser
  • Fibre optics
  • Raman fibre laser

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