Abstract

Efficient high-power operation of an erbium-ytterbium co-doped fiber laser cladding-pumped by two spatially-multiplexed and polarization combined 975 nm diode-stacks is reported. Up to 188 W of continuous-wave output at 1.57 µm was generated with a beam-quality factor (M 2) of 1.9 and an overall slope efficiency with respect to launched pump power of 41% (and 43% for output powers <120W). Tunable operation was demonstrated by use of an external cavity containing a diffraction grating and a maximum output power of 108 W at 1538 nm was generated for a launched pump power of ~336 W. The operating wavelength was tunable from 1531 to 1571 nm, with >100W output power over a tuning range of 36 nm from 1532 nm to 1568 nm.

© 2005 Optical Society of America

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References

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M. Laroche, P. Jander, W.A. Clarkson, J.K. Sahu, J. Nilsson and Y. Jeong, �??High power cladding-pumped tunable Er,Yb-doped fibre laser,�?? Electron. Lett. 40, 855-856 (2004).
[CrossRef]

IEEE J. Quantum Electron.

J. Nilsson, S.-U. Alam, J.A. Alvarez-Chavez, P.W. Turner, A.A. Clarkson, and A.B. Grudinin, �??High-power and Tunable operation of Erbium-ytterbium co-doped cladding-pumped fibre lasers,�?? IEEE J. Quantum Electron. 39, 987-994 (2003).
[CrossRef]

D.C. Brown, and H.J. Hoffman, �??Thermal, Stress, and Thermo-Optic Effects in High Average Power Double-Clad Silica Fiber Lasers,�?? IEEE J. Quantum Electron. 37, 207-217 (2001).
[CrossRef]

IEEE Photon. Technol. Lett.

J. Jeong, C. Alegria, J.K. Sahu, L. Fu, M. Ibsen, C. Codemard, M.R. Mokhtar, and J. Nillson, �??A 43-W C-band tunable narrow-linewidth Erbium-ytterbium co-doped large-core fiber laser,�?? IEEE Photon. Technol. Lett. 16, 756-758 (2004).
[CrossRef]

J. Lightwave Technol.

Opt. Commun.

J.K. Sahu, Y. Jeong, D.J. Richardson and J. Nilsson, �??A 103 W erbium-ytterbium co-doped large-core fiber laser,�?? Opt. Commun. 227, 159-163 (2003).
[CrossRef]

A. Levoshkin, A. Petrov and J. E. Montagne, �??High-efficiency diode-pumped Q-switched Yb:Er:glass laser,�?? Opt. Commun. 185, 399-405 ( 2000).
[CrossRef]

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Figures (4)

Fig. 1.
Fig. 1.

Schematic diagram of cladding pumped Er,Yb:fiber laser: (a) free-running configuration; (b) external cavity of the tunable fibre laser.

Fig. 2.
Fig. 2.

Output power versus launched pump power for free-running Er,Yb fiber laser with an external cavity.

Fig. 3.
Fig. 3.

Output power versus launched pump power with no external cavity.

Fig. 4.
Fig. 4.

Tunable Er,Yb fiber laser output power versus operating wavelength for a 2 m fiber. Inset: Output power of the tunable Er,Yb fiber laser at 1538 nm versus launched pump power.

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