Abstract

We report on a 2.3 m long air-clad ytterbium-doped large-mode-area photonic crystal fiber laser generating up to 80 W output power with a slope efficiency of 78%. Single transverse mode operation is achieved with a mode-field area of 350 µm2. No thermo-optical limitations are observed at the extracted ~35W/m, therefore such fibers allow scaling to even higher powers.

© 2003 Optical Society of America

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References

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Electron. Lett. (1)

W.J. Wadsworth, J.C. Knight, W.H. Reeves and P.St.J. Russell, �??Yb3+-doped photonic crystal fibre laser,�?? Electron. Lett. 36, 1452-1453 (2000).
[CrossRef]

Opt. Express (3)

Opt. Lett. (4)

Other (5)

E. Snitzer, H. Po, F. Hakimi, R. Tumminelli, and B.C. McCollum, �??Double Clad, Offset Core Nd Fiber Laser,�?? Optical Fiber Sensors Conference, New Orleans, 1988, PD5.

W. J. Wadsworth, J.C. Knight, and P. St. J. Russell, �??Large mode area photonic crystal fibre laser,�?? in Conference on Lasers and Electro-Optics 2001, Vol. 56 of OSA Trends in Optics and Photonics Series (Optical Society of America, Washington, D.C., 2001), paper CWC1.

G.P. Agrawal, Nonlinear Fiber Optics, (Academic, New York 1995).

N.S. Platonov, D.V. Gapontsev, V.P. Gapontsev, and V. Shumilin, �??135 W cw fiber laser with perfect single mode output�??, in Conference on Lasers and Electro-Optics (Optical Society of America, Washighton, D.C., 2002), postdeadline paper CPDC3.

J. Limpert, A. Liem, H. Zellmer, and A. Tünnermann, �??Continuous-wave high-brightness fiber laser systems,�?? in Advanced Solid-State Photonics 2003, postdeadline paper 1.

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Figures (4)

Fig. 1.
Fig. 1.

Scanning electron microscope images of the air-clad ytterbium-doped large-mode-area fiber; (b) close-up of core region

Fig. 2.
Fig. 2.

Calculated intensity distributions of the air-silica microstructured core without (a) and with doping (b), lines represent 2 dB differences in intensity

Fig. 3.
Fig. 3.

Laser characteristics of the high power air-clad microstructure ytterbium-doped large-mode-area fiber

Fig. 4.
Fig. 4.

Measured intensity distribution of the emitted beam of the microstructure large-modearea fiber laser

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