Abstract

We present a diode-pumped high-power continuous-wave (cw) laser at 912 nm based on the quasi-three-level 4 F 3/24 I 9/2 transition in Nd:GdVO4 crystal. By using a 5-mm-long conventional bulk crystal with 0.2at.% Nd3+-doped concentration, the maximum output power of 12.0 W is obtained, with a slope efficiency of 29.3%. To the best of our knowledge, this is the highest output at 912 nm generated by diode-pumped Nd:GdVO4 lasers. Furthermore, 3.2 W 456 nm deep-blue light is acquired by frequency doubling, resulting in an optical-to-optical efficiency of 8.0%. The short-term power instability of the blue laser is less than 3%.

© 2009 Optical Society of America

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References

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  1. T. Y. Fan and R. L. Byer, "Modeling and CW operation of a quasi-three-level 946 nm Nd:YAG laser," IEEE J. Quantum Electron. 23, 605-612 (1987).
    [CrossRef]
  2. R. Zhou, T. L. Zhang, E. B. Li, X. Ding, Z. Q. Cai, B. G. Zhang, W. Q. Wen, P. Wang, and J. Q. Yao, "8.3 W diode-end-pumped continuous-wave Nd:YAG laser operating at 946-nm," Opt. Express 13, 10115-10119 (2005), http://www.opticsinfobase.org/abstract.cfm?URI=oe-13-25-10115.
    [CrossRef] [PubMed]
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    [CrossRef] [PubMed]
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    [CrossRef] [PubMed]
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    [CrossRef] [PubMed]
  10. Y. F. Lü, X. H. Zhang, Z. H. Yao, and F. D. Zhang, "6.2-W deep blue light generation by intracavity frequency-doubled Nd:GdVO4 using BiBO," Chin. Opt. Lett. 5, 407-408 (2007).
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2007

2006

2005

2003

1987

T. Y. Fan and R. L. Byer, "Modeling and CW operation of a quasi-three-level 946 nm Nd:YAG laser," IEEE J. Quantum Electron. 23, 605-612 (1987).
[CrossRef]

Bu, Y. K.

Byer, R. L.

T. Y. Fan and R. L. Byer, "Modeling and CW operation of a quasi-three-level 946 nm Nd:YAG laser," IEEE J. Quantum Electron. 23, 605-612 (1987).
[CrossRef]

Cai, Z. Q.

Czeranowsky, C.

Ding, X.

Fan, T. Y.

T. Y. Fan and R. L. Byer, "Modeling and CW operation of a quasi-three-level 946 nm Nd:YAG laser," IEEE J. Quantum Electron. 23, 605-612 (1987).
[CrossRef]

Heumann, E.

Huber, G.

Jia, F. Q.

Li, E. B.

Li, H. F.

Lü, Y. F.

Qian, L. S.

Wang, P.

Wen, W. Q.

Xue, Q. H.

Yao, J. Q.

Yao, Z. H.

Zhang, B. G.

Zhang, F. D.

Zhang, T. L.

Zhang, X. H.

Zheng, Q.

Zhou, R.

Chin. Opt. Lett.

IEEE J. Quantum Electron.

T. Y. Fan and R. L. Byer, "Modeling and CW operation of a quasi-three-level 946 nm Nd:YAG laser," IEEE J. Quantum Electron. 23, 605-612 (1987).
[CrossRef]

Opt. Express

Opt. Lett.

Other

O. Svelto. Principle of Lasers, 4th ed. (Springer, New York, 1998).

J. Gao, X. Yu, F. Chen, X. D. Li, Z. Zhang, J. H. Yu, and Y. Z. Wang, "Characteristics of CW and A-O Q-switched Nd:GdVO4 laser operation at 912 nm," in Advanced Solid-State Photonics, OSA Technical Digest Series (CD) (Optical Society of America, 2008), paper WB7, http://www.opticsinfobase.org/abstract.cfm?URI=ASSP-2008-WB7.

J. Gao, M. Larionov, J. Speiser, A. Giesen, A. Douillet, J, Keupp, E. M. Rasel, and W. Ertmer, "Nd:YVO4 thin disk laser with 5.8 watts output power at 914 nm," in Conference on Lasers and Electro-Optics, Vol. 73 of OSA Trends in Optics and Photonics Series (Optical Society of America, 2002), paper CTuI1.

J. Speiser, A. Giesen, and J. Gao, "25-W diode-pumped continuous-wave quasi-three-level Nd:YAG thin disk laser," in Advanced Solid-State Photonics, Technical Digest (Optical Society of America, 2005), paper TuB34, http://www.opticsinfobase.org/abstract.cfm?URI=ASSP-2005-TuB34.

J. W. Dawson, R. Beach, A. Drobshoff, Z. Liao, D. M. Pennington, S. A. P, L. Taylor, W. Hackenberg, and D. Bonaccini, "Scalable 11 W 938 nm Nd3+ doped fiber laser," in Advanced Solid-State Photonics, (Optical Society of America, 2004), paper MD8, >http://www.opticsinfobase.org/viewmedia.cfm?URI=ASSP-2004-MD8.

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Figures (7)

Fig. 1.
Fig. 1.

Schematic diagrams of the experimental setup. (a) is for fundamental 912 nm infrared laser and (b) is for the frequency doubled 456 nm blue laser.

Fig. 2.
Fig. 2.

Sagittal radius and tangential radius of laser mode in the middle of Nd:GdVO4 and BiBO versus focal length of the thermal lens (f T).

Fig. 3.
Fig. 3.

Output power at 912 nm laser versus the incident pump power

Fig. 4.
Fig. 4.

The spatial beam profile (a) two-dimensional and (b) three-dimensional for 912 nm laser at 10 W output power level.

Fig. 5.
Fig. 5.

Beam radius for the 912 laser at 10 W output power level

Fig. 6.
Fig. 6.

Dependence of the M 2 value and brightness on the output power of 912 nm laser.

Fig. 7.
Fig. 7.

456 nm blue laser output power as a function of the incident pump power.

Equations (1)

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B = P M x 2 M y 2 λ 2

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