Abstract

A simple method for simultaneously exciting the fundamental (TEM00) transverse mode and first order Laguerre-Gaussian (LG01) donut mode in an end-pumped solid-state laser to yield a quasi-top-hat output beam is reported. This approach has been applied to an Er:YAG laser, in-band pumped by an Er,Yb fiber laser, yielding 9.6 W of continuous-wave output at 1645 nm in a top-hat-like beam with beam propagation factor (M2)<2.1 for 24 W of incident pump power at 1532 nm. The corresponding slope efficiency with respect to incident pump power was 49%. The prospects of further scaling of output power and improved overall efficiency are considered.

© 2012 Optical Society of America

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References

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  1. O. Homburg, F. Völkermeyer, F. Toennissen, H. Ganser, and T. Mitra, Proceedings of WLT Conference on Lasers in Manufacturing (Munich, Germany, 2007).
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2011 (1)

2009 (1)

J. W. Kim, D. Y. Shen, J. K. Sahu, and W. A. Clarkson, IEEE J. Sel. Top. Quantum Electron. 15, 361 (2009).
[CrossRef]

2007 (1)

2004 (1)

M. Gerber and T. Graf, IEEE J. Quantum Elect. 40, 741 (2004).
[CrossRef]

2003 (1)

1983 (1)

Akiyama, D.

Andrews, L.

Bräuer, A.

Clarkson, W. A.

J. W. Kim, J. I. Mackenzie, J. R. Hayes, and W. A. Clarkson, Opt. Express 19, 14526 (2011).
[CrossRef]

J. W. Kim, D. Y. Shen, J. K. Sahu, and W. A. Clarkson, IEEE J. Sel. Top. Quantum Electron. 15, 361 (2009).
[CrossRef]

Dannberg, P.

Ganser, H.

O. Homburg, F. Völkermeyer, F. Toennissen, H. Ganser, and T. Mitra, Proceedings of WLT Conference on Lasers in Manufacturing (Munich, Germany, 2007).

Gerber, M.

M. Gerber and T. Graf, IEEE J. Quantum Elect. 40, 741 (2004).
[CrossRef]

Graf, T.

M. Gerber and T. Graf, IEEE J. Quantum Elect. 40, 741 (2004).
[CrossRef]

Hayes, J. R.

Homburg, O.

O. Homburg, F. Völkermeyer, F. Toennissen, H. Ganser, and T. Mitra, Proceedings of WLT Conference on Lasers in Manufacturing (Munich, Germany, 2007).

Kim, J. W.

J. W. Kim, J. I. Mackenzie, J. R. Hayes, and W. A. Clarkson, Opt. Express 19, 14526 (2011).
[CrossRef]

J. W. Kim, D. Y. Shen, J. K. Sahu, and W. A. Clarkson, IEEE J. Sel. Top. Quantum Electron. 15, 361 (2009).
[CrossRef]

Mackenzie, J. I.

Matsuura, Y.

Mitra, T.

O. Homburg, F. Völkermeyer, F. Toennissen, H. Ganser, and T. Mitra, Proceedings of WLT Conference on Lasers in Manufacturing (Munich, Germany, 2007).

Miyagi, M.

Phillips, R. L.

Sahu, J. K.

J. W. Kim, D. Y. Shen, J. K. Sahu, and W. A. Clarkson, IEEE J. Sel. Top. Quantum Electron. 15, 361 (2009).
[CrossRef]

Shen, D. Y.

J. W. Kim, D. Y. Shen, J. K. Sahu, and W. A. Clarkson, IEEE J. Sel. Top. Quantum Electron. 15, 361 (2009).
[CrossRef]

Sinzinger, S.

Toennissen, F.

O. Homburg, F. Völkermeyer, F. Toennissen, H. Ganser, and T. Mitra, Proceedings of WLT Conference on Lasers in Manufacturing (Munich, Germany, 2007).

Völkermeyer, F.

O. Homburg, F. Völkermeyer, F. Toennissen, H. Ganser, and T. Mitra, Proceedings of WLT Conference on Lasers in Manufacturing (Munich, Germany, 2007).

Wippermann, F.

Zeitner, U.

Appl. Opt. (2)

IEEE J. Quantum Elect. (1)

M. Gerber and T. Graf, IEEE J. Quantum Elect. 40, 741 (2004).
[CrossRef]

IEEE J. Sel. Top. Quantum Electron. (1)

J. W. Kim, D. Y. Shen, J. K. Sahu, and W. A. Clarkson, IEEE J. Sel. Top. Quantum Electron. 15, 361 (2009).
[CrossRef]

Opt. Express (2)

Other (1)

O. Homburg, F. Völkermeyer, F. Toennissen, H. Ganser, and T. Mitra, Proceedings of WLT Conference on Lasers in Manufacturing (Munich, Germany, 2007).

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Figures (4)

Fig. 1.
Fig. 1.

Schematic diagram showing technique for generating a quasi-top-hat output beam from an end-pumped solid-state laser.

Fig. 2.
Fig. 2.

Schematic diagram of the fiber-laser-pumped Er:YAG laser.

Fig. 3.
Fig. 3.

The output beam profiles of (a) the TEM00-only mode (b) the LG01-only mode and (c) the top-hat mode. (d) Output power of the Er:YAG laser with a top-hat output beam as a function of incident pump power.

Fig. 4.
Fig. 4.

Calculated and measured transverse intensity distributions for TEM00-only, LG01-only, and top-hat beams.

Equations (2)

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Itophat(r)=γI0,0(r)+I0,1(r)=[γ+(2r2w2)]I0,0(r)
M2=20r2Itophat(r)rdrw02·0Itophat(r)rdr=γ+2γ+1

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