Highly efficient erbium-ytterbium co-doped fibre laser with 188W output power at 1565nm

Shen, D.Y., Sahu, Jayanta and Clarkson, W.A. (2006) Highly efficient erbium-ytterbium co-doped fibre laser with 188W output power at 1565nm. In CLEO/Europe. 2005 Conference on Lasers and Electro-Optics Europe, 2005. IEEE. p. 510 . (doi:10.1109/CLEOE.2005.1568288).

Abstract

High-power solid-state laser sources operating in the eye-safe wavelength regime around ~1.5-1.6 µm have numerous applications in areas such as remote sensing, range finding, and free space and satellite communications. Cladding pumping of Er,Yb-doped fibre lasers (EYDFLs) offers a promising route to output in this spectral region with the attraction of a geometry that allows scaling to high power levels without decreasing efficiency or degrading beam quality. Moreover, the broad emission linewidths that are typical in glass hosts allows for flexibility in the operating wavelength. To date, operation of an EYDFL at 103 W has been reported with a slope efficiency of 30% with respect to launched pump power. In this paper we report a highly efficient Er co-doped fibre laser, cladding pumped by a 975 nm diode-stack source, that generates up to 188 W of continuous-wave (cw) output at 1565 nm with an overall slope efficiency of 41% with respect to launched pump power. At a launched pump power of 336 W, the EYDFL when operated in tunable cavity configuration, generated a maximum output power of 108 W at 1538 nm and the lasing wavelength could be tuned over 36 nm from 1532 to 1568 nm at output power levels >100 W with a linewidth of ~1nm.

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Contributors

Author: Jayanta Sahu

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