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Opt Express. 2011 Jul 18;19(15):13940-8. doi: 10.1364/OE.19.013940.

On the tunability of a narrow-linewidth Yb-fiber laser from three- to four-level lasing behaviour.

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  • 1Department of Applied Physics, Royal Institute of Technology, 10691 Stockholm, Sweden. pz@laserphysics.kth.se

Abstract

We report on a tunable multi-watt ytterbium-doped fiber laser bridging the gap from three-level lasing around 980 nm to true four-level lasing at 1100 nm. Wavelength-locking and -tuning was achieved by using an external volume-Bragg grating(VBG) as the cavity end mirror. The results are compared with detailed numerical calculations based on a spectrally resolved rate equation analysis, taking competing emission at other wavelengths into account.

PMID:
21934754
[PubMed]
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