Journal
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
Volume 20, Issue 5, Pages -Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JSTQE.2014.2321279
Keywords
Beam quality; brightness; cladding-pumping; fiber amplifiers; fiber lasers; high power; holmium-doped; industrial lasers; material processing; modal instabilities; optical damage; optical fibers; optical fiber nonlinearities; optical pulses; photodarkening; pump combiners; thulium-doped; transverse mode instabilities; ytterbium-doped
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Funding
- EPSRC Center for Innovative Manufacturing in Photonics, University of Southampton
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In this paper, we summarize the fundamental properties and review the latest developments in high power fiber lasers. The review is focused primarily on the most common fiber laser configurations and the associated cladding pumping issues. Special attention is placed on pump combination techniques and the parameters that affect the brightness enhancement observed in single-mode and multimode high power fiber lasers. The review includes the major limitations imposed by fiber nonlinearities and other parasitic effects, such as optical damage, transverse modal instabilities and photodarkening. Finally, the paper summarizes the power evolution in continuous-wave and pulsed ytterbium-doped fiber lasers and their impact on industrial applications.
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