Abstract

A diode-pumped Q-switched Nd:YAG laser that operates at the eye-safe 1444 nm wavelength has been developed. When pumped by a 10-W fiber-coupled array at 808 nm, it generated 1 W in cw operation and 560 mW at 20-kHz repetition rate with active Q-switching. Design issues such as thermal lensing characterization and beam quality are discussed.

© 1998 Optical Society of America

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References

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  1. See, for example, Advanced Solid State Lasers, C. R. Pollock, W. R. Bosenberg, eds., Vol 10 of OSA Trends in Optics and Photonics (Optical Soceity of America, Washington, D.C., 1997).
  2. 1997 product catalog, SDL, Inc., San Jose, Calif.
  3. N. Hodgson, W. L. Nighan, D. J. Golding, D. Eisel, “Efficient 100-W Nd:YAG laser operating at a wavelength of 1.444 μm,” Opt. Lett. 19, 1328–1330 (1994).
    [CrossRef] [PubMed]
  4. H. M. Kretschmann, F. Heine, V. G. Ostrumov, G. Huber, “High-power diode-pumped continuous-wave Nd3+ lasers at wavelength near 1.44 μm,” Opt. Lett. 22, 466–468 (1997).
    [CrossRef] [PubMed]
  5. A. Agnesi, S. Dell’Acqua, P. G. Gobbi, D. Ragazzi, G. C. Reali, “Design and characterization of a diode-pumped, single longitudinal and transverse mode, intracavity-doubled cw Nd:YAG laser,” Appl. Optics 36, 597–601 (1997).
    [CrossRef]
  6. Y. F. Chen, T. M. Huang, C. F. Kao, C. L. Wang, S. C. Wang, “Optimization in scaling fiber-coupled laser-diode end-pumped lasers to higher power: influence of thermal effect,” IEEE J. Quantum Electron. 33, 1424–1429 (1997).
    [CrossRef]

1997 (3)

H. M. Kretschmann, F. Heine, V. G. Ostrumov, G. Huber, “High-power diode-pumped continuous-wave Nd3+ lasers at wavelength near 1.44 μm,” Opt. Lett. 22, 466–468 (1997).
[CrossRef] [PubMed]

A. Agnesi, S. Dell’Acqua, P. G. Gobbi, D. Ragazzi, G. C. Reali, “Design and characterization of a diode-pumped, single longitudinal and transverse mode, intracavity-doubled cw Nd:YAG laser,” Appl. Optics 36, 597–601 (1997).
[CrossRef]

Y. F. Chen, T. M. Huang, C. F. Kao, C. L. Wang, S. C. Wang, “Optimization in scaling fiber-coupled laser-diode end-pumped lasers to higher power: influence of thermal effect,” IEEE J. Quantum Electron. 33, 1424–1429 (1997).
[CrossRef]

1994 (1)

Agnesi, A.

A. Agnesi, S. Dell’Acqua, P. G. Gobbi, D. Ragazzi, G. C. Reali, “Design and characterization of a diode-pumped, single longitudinal and transverse mode, intracavity-doubled cw Nd:YAG laser,” Appl. Optics 36, 597–601 (1997).
[CrossRef]

Chen, Y. F.

Y. F. Chen, T. M. Huang, C. F. Kao, C. L. Wang, S. C. Wang, “Optimization in scaling fiber-coupled laser-diode end-pumped lasers to higher power: influence of thermal effect,” IEEE J. Quantum Electron. 33, 1424–1429 (1997).
[CrossRef]

Dell’Acqua, S.

A. Agnesi, S. Dell’Acqua, P. G. Gobbi, D. Ragazzi, G. C. Reali, “Design and characterization of a diode-pumped, single longitudinal and transverse mode, intracavity-doubled cw Nd:YAG laser,” Appl. Optics 36, 597–601 (1997).
[CrossRef]

Eisel, D.

Gobbi, P. G.

A. Agnesi, S. Dell’Acqua, P. G. Gobbi, D. Ragazzi, G. C. Reali, “Design and characterization of a diode-pumped, single longitudinal and transverse mode, intracavity-doubled cw Nd:YAG laser,” Appl. Optics 36, 597–601 (1997).
[CrossRef]

Golding, D. J.

Heine, F.

Hodgson, N.

Huang, T. M.

Y. F. Chen, T. M. Huang, C. F. Kao, C. L. Wang, S. C. Wang, “Optimization in scaling fiber-coupled laser-diode end-pumped lasers to higher power: influence of thermal effect,” IEEE J. Quantum Electron. 33, 1424–1429 (1997).
[CrossRef]

Huber, G.

Kao, C. F.

Y. F. Chen, T. M. Huang, C. F. Kao, C. L. Wang, S. C. Wang, “Optimization in scaling fiber-coupled laser-diode end-pumped lasers to higher power: influence of thermal effect,” IEEE J. Quantum Electron. 33, 1424–1429 (1997).
[CrossRef]

Kretschmann, H. M.

Nighan, W. L.

Ostrumov, V. G.

Ragazzi, D.

A. Agnesi, S. Dell’Acqua, P. G. Gobbi, D. Ragazzi, G. C. Reali, “Design and characterization of a diode-pumped, single longitudinal and transverse mode, intracavity-doubled cw Nd:YAG laser,” Appl. Optics 36, 597–601 (1997).
[CrossRef]

Reali, G. C.

A. Agnesi, S. Dell’Acqua, P. G. Gobbi, D. Ragazzi, G. C. Reali, “Design and characterization of a diode-pumped, single longitudinal and transverse mode, intracavity-doubled cw Nd:YAG laser,” Appl. Optics 36, 597–601 (1997).
[CrossRef]

Wang, C. L.

Y. F. Chen, T. M. Huang, C. F. Kao, C. L. Wang, S. C. Wang, “Optimization in scaling fiber-coupled laser-diode end-pumped lasers to higher power: influence of thermal effect,” IEEE J. Quantum Electron. 33, 1424–1429 (1997).
[CrossRef]

Wang, S. C.

Y. F. Chen, T. M. Huang, C. F. Kao, C. L. Wang, S. C. Wang, “Optimization in scaling fiber-coupled laser-diode end-pumped lasers to higher power: influence of thermal effect,” IEEE J. Quantum Electron. 33, 1424–1429 (1997).
[CrossRef]

Appl. Optics (1)

A. Agnesi, S. Dell’Acqua, P. G. Gobbi, D. Ragazzi, G. C. Reali, “Design and characterization of a diode-pumped, single longitudinal and transverse mode, intracavity-doubled cw Nd:YAG laser,” Appl. Optics 36, 597–601 (1997).
[CrossRef]

IEEE J. Quantum Electron. (1)

Y. F. Chen, T. M. Huang, C. F. Kao, C. L. Wang, S. C. Wang, “Optimization in scaling fiber-coupled laser-diode end-pumped lasers to higher power: influence of thermal effect,” IEEE J. Quantum Electron. 33, 1424–1429 (1997).
[CrossRef]

Opt. Lett. (2)

Other (2)

See, for example, Advanced Solid State Lasers, C. R. Pollock, W. R. Bosenberg, eds., Vol 10 of OSA Trends in Optics and Photonics (Optical Soceity of America, Washington, D.C., 1997).

1997 product catalog, SDL, Inc., San Jose, Calif.

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Figures (4)

Fig. 1
Fig. 1

Experimental setup: FCD, fiber-coupled array; OC, output coupler; AOQ, acousto-optic Q-switch.

Fig. 2
Fig. 2

Output power versus input power for several cavity lengths (L).

Fig. 3
Fig. 3

Beam quality (M 2) and output beam waist (w 0) as a function of input power.

Fig. 4
Fig. 4

Pulse energy and duration as a function of the repetition rate at P i ≈ 10 W. The dashed curve corresponds to a best fit with a fluorescence time of 230 μs.

Equations (1)

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w 0 = λ L π f th L - 1 1 / 4 .

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