Based on their recent breakthrough achievements in extending the parameter ranges of contemporary fiber lasers, particularly with respect to increasing their average output power, the IAP scientists Limpert and Tünnermann have just published a review on "High-power fibre lasers"  (Nature Photonics, doi: 10.1038/nphoton.2013.273).

Abstract: Fibre lasers are now associated with high average powers and very high beam qualities. Both these characteristics are required by many industrial, defence and scientific applications, which explains why fibre lasers have become one of the most popular laser technologies. However, this success, which is largely founded on the outstanding characteristics of fibres as an active medium, has only been achieved through researchers around the world striving to overcome many of the limitations imposed by the fibre architecture. This Review focuses on these limitations, both past and current, and the creative solutions that have been proposed for overcoming them. These solutions have enabled fibre lasers to generate the highest diffraction-limited average power achieved to date by solid-state lasers.

AT-JL-Nature photonics
Schematic of a high-power, double-clad fibre amplifier. The signal is coupled in the fibre core, which contains the active material, whereas the pump
is coupled in the fibre cladding. This structure allows the pump to be progressively absorbed by the active material in the core as the pump
propagates along the fibre. This absorbed pumped energy is used to amplify the signal.

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News from: 07.11.2013 16:00
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