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Optical fibers for high-power operation

Optical fibers for high-power operation

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Advances in High-Power Fiber and Diode Laser Engineering — Recommend this title to your library

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Optical fibers have demonstrated, against all early predictions, that their geometry is extremely well-suited for handling high optical powers. However, over the years, many refinements have been done to the basic structure of these waveguides to allow guiding and generating high-powers. As a result of this development the fibers employed in high-power laser systems differ significantly from those typically used in other fields such as telecommunications and/or sensors. Therefore, this chapter is devoted to describing and explaining the main intricacies of those optical fiber designs presently used for high-power operation. In this context, the main goal of this chapter is that the reader gets an overview of the different fiber designs and building blocks of high-power optical fibers. The chapter is divided into three main parts: a brief historical overview of the evolution of this technology, a description of the main constituents of fibers for high-power operation (including the core, the pump cladding and materials), and, finally, an outlook in which novel trends in the design of these waveguides are briefly described.

Chapter Contents:

  • 7.1 A brief historical overview
  • 7.2 High-power fiber laser systems: performance against the odds
  • 7.2.1 Stimulated Brillouin scattering
  • 7.2.2 Stimulated Raman scattering
  • 7.2.3 Self-phase modulation
  • 7.2.4 Self-focusing
  • 7.2.5 Mode shrinking
  • 7.2.6 Transverse mode instabilities
  • 7.3 Optical fibers for high-power operation
  • 7.3.1 The fiber core: guiding mechanisms
  • 7.3.1.1 Step-index fibers
  • 7.3.1.2 Photonic-crystal fibers
  • 7.3.1.3 General considerations
  • 7.3.2 The fiber cladding: added functionality
  • 7.3.2.1 Single-clad fibers
  • 7.3.2.2 Double-clad fibers
  • 7.3.2.3 Triple-clad fibers
  • 7.3.3 The fiber material: laser properties
  • 7.3.3.1 Laser active ions
  • 7.3.3.2 General considerations
  • 7.4 Outlook: multicore fibers
  • References

Inspec keywords: optical fibre cladding; optical design techniques; fibre lasers; optical pumping; reviews; laser beams

Other keywords: pump cladding; high-power laser systems; overview; optical fiber designs; high-power optical fibers; high optical powers; high-power operation; waveguides

Subjects: Fibre optics; Optical fibre fabrication, cladding, splicing, joining; Optical system design; Fibre lasers and amplifiers; Design of specific laser systems; Fibre lasers and amplifiers; Reviews and tutorial papers; resource letters

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