Abstract

A master oscillator power amplifier (MOPA) Nd:YVO4 laser with a controllable gain distribution was built up in our experiment. With the gain guiding effects, the final beam quality of the MOPA system with two amplification stages was near-diffraction-limited (M21.2) compared with M22.5 in the master oscillator, and the total extraction efficiency of amplifier stages was up to 44% corresponding to a 107 W laser output. The enhancement of the beam quality during the amplifying process was also observed in the other two MOPA lasers with the optimal gain adjusting, a MOPA laser containing a Nd:YVO4 seed laser and four Nd:YVO4 amplifier stages, and another MOPA laser containing a Nd:yttrium aluminum garnet acoustic-optic cavity dump pulsed seed laser and four Nd:YVO4 amplifier stages. It has been shown for the first time to our knowledge that not only the power scaling can be realized in the MOPA configuration, but the beam quality can be enhanced as well because of the gain guiding effects.

© 2010 Optical Society of America

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References

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  1. C. X. Wang, G. Y. Wang, A. V. Hicks, D. R. Dudley, H. Y. Pang, and N. Hodgson, “High-power Q-switched TEM00 mode diode-pumped solid state lasers with >30 W output power at 355 nm,” Proc. SPIE 6100, 610019 (2006).
    [CrossRef]
  2. J. Kim, M. Yarrow, and W. Clarkson, “High power single-frequency continuous-wave Nd:YVO4 master-oscillator power amplifier,” Appl. Phys. B 85, 539–543 (2006).
    [CrossRef]
  3. B. Luther-Davies, V. Kolev, M. Lederer, N. Madsen, A. Rode, J. Giesekus, K.-M. Du, and M. Duering, “Table-top 50-W laser system for ultra-fast laser ablation,” Appl. Phys. A 79, 1051–1055 (2004).
    [CrossRef]
  4. A. Minassian, B. Thompson, G. Smith, and M. Damzen, “High-power scaling (>100 W) of a diode-pumped TEM00Nd:GdVO4 laser system,” IEEE J. Sel. Top. Quantum Electron. 11, 621–625 (2005).
    [CrossRef]
  5. W.Koechner, ed., Solid-State Laser Engineering, 6th ed. (Springer-Verlag, 1999).
  6. M. J. Yarrow, J. W. Kim, and W. A. Clarkson, “Influence of gain-guiding on beam quality in a thermally aberrated end-pumped Nd:YVO4 amplifier,” in The 2nd EPS-QEOD Europhoton Conference (Institute of Physics, 2006), http://www.orc.soton.ac.uk/viewpublication.html?pid=3494.
  7. W. Risk, “Modeling of longitudinally pumped solid-state lasers exhibiting reabsorption losses,” J. Opt. Soc. Am. B 5, 1412–1423 (1988).
    [CrossRef]

2006 (2)

C. X. Wang, G. Y. Wang, A. V. Hicks, D. R. Dudley, H. Y. Pang, and N. Hodgson, “High-power Q-switched TEM00 mode diode-pumped solid state lasers with >30 W output power at 355 nm,” Proc. SPIE 6100, 610019 (2006).
[CrossRef]

J. Kim, M. Yarrow, and W. Clarkson, “High power single-frequency continuous-wave Nd:YVO4 master-oscillator power amplifier,” Appl. Phys. B 85, 539–543 (2006).
[CrossRef]

2005 (1)

A. Minassian, B. Thompson, G. Smith, and M. Damzen, “High-power scaling (>100 W) of a diode-pumped TEM00Nd:GdVO4 laser system,” IEEE J. Sel. Top. Quantum Electron. 11, 621–625 (2005).
[CrossRef]

2004 (1)

B. Luther-Davies, V. Kolev, M. Lederer, N. Madsen, A. Rode, J. Giesekus, K.-M. Du, and M. Duering, “Table-top 50-W laser system for ultra-fast laser ablation,” Appl. Phys. A 79, 1051–1055 (2004).
[CrossRef]

1988 (1)

Clarkson, W.

J. Kim, M. Yarrow, and W. Clarkson, “High power single-frequency continuous-wave Nd:YVO4 master-oscillator power amplifier,” Appl. Phys. B 85, 539–543 (2006).
[CrossRef]

Clarkson, W. A.

M. J. Yarrow, J. W. Kim, and W. A. Clarkson, “Influence of gain-guiding on beam quality in a thermally aberrated end-pumped Nd:YVO4 amplifier,” in The 2nd EPS-QEOD Europhoton Conference (Institute of Physics, 2006), http://www.orc.soton.ac.uk/viewpublication.html?pid=3494.

Damzen, M.

A. Minassian, B. Thompson, G. Smith, and M. Damzen, “High-power scaling (>100 W) of a diode-pumped TEM00Nd:GdVO4 laser system,” IEEE J. Sel. Top. Quantum Electron. 11, 621–625 (2005).
[CrossRef]

Du, K. -M.

B. Luther-Davies, V. Kolev, M. Lederer, N. Madsen, A. Rode, J. Giesekus, K.-M. Du, and M. Duering, “Table-top 50-W laser system for ultra-fast laser ablation,” Appl. Phys. A 79, 1051–1055 (2004).
[CrossRef]

Dudley, D. R.

C. X. Wang, G. Y. Wang, A. V. Hicks, D. R. Dudley, H. Y. Pang, and N. Hodgson, “High-power Q-switched TEM00 mode diode-pumped solid state lasers with >30 W output power at 355 nm,” Proc. SPIE 6100, 610019 (2006).
[CrossRef]

Duering, M.

B. Luther-Davies, V. Kolev, M. Lederer, N. Madsen, A. Rode, J. Giesekus, K.-M. Du, and M. Duering, “Table-top 50-W laser system for ultra-fast laser ablation,” Appl. Phys. A 79, 1051–1055 (2004).
[CrossRef]

Giesekus, J.

B. Luther-Davies, V. Kolev, M. Lederer, N. Madsen, A. Rode, J. Giesekus, K.-M. Du, and M. Duering, “Table-top 50-W laser system for ultra-fast laser ablation,” Appl. Phys. A 79, 1051–1055 (2004).
[CrossRef]

Hicks, A. V.

C. X. Wang, G. Y. Wang, A. V. Hicks, D. R. Dudley, H. Y. Pang, and N. Hodgson, “High-power Q-switched TEM00 mode diode-pumped solid state lasers with >30 W output power at 355 nm,” Proc. SPIE 6100, 610019 (2006).
[CrossRef]

Hodgson, N.

C. X. Wang, G. Y. Wang, A. V. Hicks, D. R. Dudley, H. Y. Pang, and N. Hodgson, “High-power Q-switched TEM00 mode diode-pumped solid state lasers with >30 W output power at 355 nm,” Proc. SPIE 6100, 610019 (2006).
[CrossRef]

Kim, J.

J. Kim, M. Yarrow, and W. Clarkson, “High power single-frequency continuous-wave Nd:YVO4 master-oscillator power amplifier,” Appl. Phys. B 85, 539–543 (2006).
[CrossRef]

Kim, J. W.

M. J. Yarrow, J. W. Kim, and W. A. Clarkson, “Influence of gain-guiding on beam quality in a thermally aberrated end-pumped Nd:YVO4 amplifier,” in The 2nd EPS-QEOD Europhoton Conference (Institute of Physics, 2006), http://www.orc.soton.ac.uk/viewpublication.html?pid=3494.

Kolev, V.

B. Luther-Davies, V. Kolev, M. Lederer, N. Madsen, A. Rode, J. Giesekus, K.-M. Du, and M. Duering, “Table-top 50-W laser system for ultra-fast laser ablation,” Appl. Phys. A 79, 1051–1055 (2004).
[CrossRef]

Lederer, M.

B. Luther-Davies, V. Kolev, M. Lederer, N. Madsen, A. Rode, J. Giesekus, K.-M. Du, and M. Duering, “Table-top 50-W laser system for ultra-fast laser ablation,” Appl. Phys. A 79, 1051–1055 (2004).
[CrossRef]

Luther-Davies, B.

B. Luther-Davies, V. Kolev, M. Lederer, N. Madsen, A. Rode, J. Giesekus, K.-M. Du, and M. Duering, “Table-top 50-W laser system for ultra-fast laser ablation,” Appl. Phys. A 79, 1051–1055 (2004).
[CrossRef]

Madsen, N.

B. Luther-Davies, V. Kolev, M. Lederer, N. Madsen, A. Rode, J. Giesekus, K.-M. Du, and M. Duering, “Table-top 50-W laser system for ultra-fast laser ablation,” Appl. Phys. A 79, 1051–1055 (2004).
[CrossRef]

Minassian, A.

A. Minassian, B. Thompson, G. Smith, and M. Damzen, “High-power scaling (>100 W) of a diode-pumped TEM00Nd:GdVO4 laser system,” IEEE J. Sel. Top. Quantum Electron. 11, 621–625 (2005).
[CrossRef]

Pang, H. Y.

C. X. Wang, G. Y. Wang, A. V. Hicks, D. R. Dudley, H. Y. Pang, and N. Hodgson, “High-power Q-switched TEM00 mode diode-pumped solid state lasers with >30 W output power at 355 nm,” Proc. SPIE 6100, 610019 (2006).
[CrossRef]

Risk, W.

Rode, A.

B. Luther-Davies, V. Kolev, M. Lederer, N. Madsen, A. Rode, J. Giesekus, K.-M. Du, and M. Duering, “Table-top 50-W laser system for ultra-fast laser ablation,” Appl. Phys. A 79, 1051–1055 (2004).
[CrossRef]

Smith, G.

A. Minassian, B. Thompson, G. Smith, and M. Damzen, “High-power scaling (>100 W) of a diode-pumped TEM00Nd:GdVO4 laser system,” IEEE J. Sel. Top. Quantum Electron. 11, 621–625 (2005).
[CrossRef]

Thompson, B.

A. Minassian, B. Thompson, G. Smith, and M. Damzen, “High-power scaling (>100 W) of a diode-pumped TEM00Nd:GdVO4 laser system,” IEEE J. Sel. Top. Quantum Electron. 11, 621–625 (2005).
[CrossRef]

Wang, C. X.

C. X. Wang, G. Y. Wang, A. V. Hicks, D. R. Dudley, H. Y. Pang, and N. Hodgson, “High-power Q-switched TEM00 mode diode-pumped solid state lasers with >30 W output power at 355 nm,” Proc. SPIE 6100, 610019 (2006).
[CrossRef]

Wang, G. Y.

C. X. Wang, G. Y. Wang, A. V. Hicks, D. R. Dudley, H. Y. Pang, and N. Hodgson, “High-power Q-switched TEM00 mode diode-pumped solid state lasers with >30 W output power at 355 nm,” Proc. SPIE 6100, 610019 (2006).
[CrossRef]

Yarrow, M.

J. Kim, M. Yarrow, and W. Clarkson, “High power single-frequency continuous-wave Nd:YVO4 master-oscillator power amplifier,” Appl. Phys. B 85, 539–543 (2006).
[CrossRef]

Yarrow, M. J.

M. J. Yarrow, J. W. Kim, and W. A. Clarkson, “Influence of gain-guiding on beam quality in a thermally aberrated end-pumped Nd:YVO4 amplifier,” in The 2nd EPS-QEOD Europhoton Conference (Institute of Physics, 2006), http://www.orc.soton.ac.uk/viewpublication.html?pid=3494.

Appl. Phys. A (1)

B. Luther-Davies, V. Kolev, M. Lederer, N. Madsen, A. Rode, J. Giesekus, K.-M. Du, and M. Duering, “Table-top 50-W laser system for ultra-fast laser ablation,” Appl. Phys. A 79, 1051–1055 (2004).
[CrossRef]

Appl. Phys. B (1)

J. Kim, M. Yarrow, and W. Clarkson, “High power single-frequency continuous-wave Nd:YVO4 master-oscillator power amplifier,” Appl. Phys. B 85, 539–543 (2006).
[CrossRef]

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

A. Minassian, B. Thompson, G. Smith, and M. Damzen, “High-power scaling (>100 W) of a diode-pumped TEM00Nd:GdVO4 laser system,” IEEE J. Sel. Top. Quantum Electron. 11, 621–625 (2005).
[CrossRef]

J. Opt. Soc. Am. B (1)

Proc. SPIE (1)

C. X. Wang, G. Y. Wang, A. V. Hicks, D. R. Dudley, H. Y. Pang, and N. Hodgson, “High-power Q-switched TEM00 mode diode-pumped solid state lasers with >30 W output power at 355 nm,” Proc. SPIE 6100, 610019 (2006).
[CrossRef]

Other (2)

W.Koechner, ed., Solid-State Laser Engineering, 6th ed. (Springer-Verlag, 1999).

M. J. Yarrow, J. W. Kim, and W. A. Clarkson, “Influence of gain-guiding on beam quality in a thermally aberrated end-pumped Nd:YVO4 amplifier,” in The 2nd EPS-QEOD Europhoton Conference (Institute of Physics, 2006), http://www.orc.soton.ac.uk/viewpublication.html?pid=3494.

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Figures (6)

Fig. 1
Fig. 1

Experimental layout of the dual-end-pumped MOPA laser.

Fig. 2
Fig. 2

The beam quality varying during the amplification process for (a) the output of the oscillator, after amplified by the (b) first and (c) second amplifiers, and then with adjusting the gain distribution in amplifier stages, the beam quality varies during the amplification process after amplified by the (d) first and (e) second amplifiers.

Fig. 3
Fig. 3

The beam quality was enhanced with the optimal gain distribution. (a) The output of the oscillator, after amplified by the (b) first and (c) second amplifiers.

Fig. 4
Fig. 4

The output power and beam quality factor M 2 varying with pump power in the MOPA system.

Fig. 5
Fig. 5

The experimental setups for (a) the Nd : YVO 4 MOPA laser containing four amplifier stages, and (b) the MOPA laser containing a Nd:YAG acoustic-optic cavity dump pulsed seed laser and four Nd : YVO 4 amplifier stages.

Fig. 6
Fig. 6

The beam quality varying with the amplifying process for (a) the Nd : YVO 4 MOPA laser containing four amplifier stages, and (b) the MOPA laser containing a Nd:YAG acoustic-optic cavity dump pulsed seed laser and four Nd : YVO 4 amplifier stages.

Equations (1)

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ϕ ( r , z ) = σ τ f R r p ( r , z ) N 0 σ G ( r , z ) G ( r , z ) c σ τ Φ / n ,

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