Abstract

We overcome several thermal issues present in Ho:YAG lasers by distributing the gain over a larger volume and achieve a diffraction-limited beam using coherent polarization locking. Increased single-pass absorption, suppression of output power saturation, and improvement in beam quality were shown using the coherent polarization locking technique as compared to a conventional Ho:YAG laser cavity with the same pump and cavity configuration. Ten watts of CW Ho:YAG laser power was generated with >96% coherent combining efficiency.

© 2012 Optical Society of America

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References

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2011

2008

M. Eichhorn, Appl. Phys. B 93, 269 (2008).
[CrossRef]

2007

2006

2005

T. Y. Fan, IEEE J. Sel. Top. Quantum Electron. 11, 567 (2005).
[CrossRef]

2003

2002

D. Sabourdy, V. Kermene, A. Desfarges-Berthelemot, M. Vampouille, and A. Barthelemy, Appl. Phys. B 75, 503 (2002).
[CrossRef]

Baker, J. T.

Barnes, N. P.

Barthelemy, A.

D. Sabourdy, V. Kermene, A. Desfarges-Berthelemot, M. Vampouille, and A. Barthelemy, Appl. Phys. B 75, 503 (2002).
[CrossRef]

Benham, V.

Culpepper, M. A.

Desfarges-Berthelemot, A.

D. Sabourdy, V. Kermene, A. Desfarges-Berthelemot, M. Vampouille, and A. Barthelemy, Appl. Phys. B 75, 503 (2002).
[CrossRef]

Eichhorn, M.

M. Eichhorn, Appl. Phys. B 93, 269 (2008).
[CrossRef]

Fan, T. Y.

T. Y. Fan, IEEE J. Sel. Top. Quantum Electron. 11, 567 (2005).
[CrossRef]

Filer, E. D.

Kermene, V.

D. Sabourdy, V. Kermene, A. Desfarges-Berthelemot, M. Vampouille, and A. Barthelemy, Appl. Phys. B 75, 503 (2002).
[CrossRef]

Kewitsch, A.

Koechner, W.

W. Koechner, Solid-State Laser Engineering (Springer, 2006).

Liang, W.

Lim, Y. L.

Lu, C. A.

Nelson, D. J.

Phua, P. B.

Pilkington, D.

Purnawirman,

Rakuljic, G.

Sabourdy, D.

D. Sabourdy, V. Kermene, A. Desfarges-Berthelemot, M. Vampouille, and A. Barthelemy, Appl. Phys. B 75, 503 (2002).
[CrossRef]

Sanchez, A. D.

Shay, T. M.

Spring, J.

Vampouille, M.

D. Sabourdy, V. Kermene, A. Desfarges-Berthelemot, M. Vampouille, and A. Barthelemy, Appl. Phys. B 75, 503 (2002).
[CrossRef]

Walsh, B. M.

Ward, B.

Yariv, A.

Appl. Phys. B

M. Eichhorn, Appl. Phys. B 93, 269 (2008).
[CrossRef]

D. Sabourdy, V. Kermene, A. Desfarges-Berthelemot, M. Vampouille, and A. Barthelemy, Appl. Phys. B 75, 503 (2002).
[CrossRef]

IEEE J. Sel. Top. Quantum Electron.

T. Y. Fan, IEEE J. Sel. Top. Quantum Electron. 11, 567 (2005).
[CrossRef]

J. Opt. Soc. Am. B

Opt. Express

Opt. Lett.

Other

W. Koechner, Solid-State Laser Engineering (Springer, 2006).

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Figures (5)

Fig. 1.
Fig. 1.

Schematic setup of coherent polarization locking Ho:YAG laser. HWP, half-wave plate; TFP, thin film polarizer; FM, folding mirror; DM, dichroic mirror; OC, output coupler.

Fig. 2.
Fig. 2.

Single-pass absorbed power for a single laser spot (Arm A alone) and coherently combined laser (Arm A and B).

Fig. 3.
Fig. 3.

Laser output power of single arm laser and coherent combined laser.

Fig. 4.
Fig. 4.

Output power [red (lower) curve] and combining efficiency [blue (upper) curve] for coherent combined laser with respect to pump power. Insert shows the output power of the independent Arm A and B, respectively.

Fig. 5.
Fig. 5.

Far-field beam profile of (a) coherent combined laser and (b) single arm laser at maximum output power.

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