Abstract

A Nd:YAG laser is end pumped with a 10-W laser-diode bar to produce 1.9 W of TEM00-mode power at 1.064 μm. The 10 mm × 1 μm bar is imaged into a 1.8 mm × 390 μm elliptical laser mode. Q-switched operation results in pulse energies of 160 μJ at a 10-kHz repetition rate, which rises to 250 μJ at 5 kHz. Frequency doubling in KTP produces 75-μJ pulses at 10 kHz, corresponding to 750 mW of average power at 532 nm and a nonlinear conversion efficiency of 47%.

© 1991 Optical Society of America

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References

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  1. W. Koechner, Solid-State Laser Engineering (Springer-Verlag, New York, 1988), p. 314.
  2. G. J. Kintz, T. Baer, in Lasers and Electro-Optics Society Annual Meeting (Lasers and Electro-Optics Society, New York, 1989), paper ELT3.5.
  3. T. Y. Fan, R. L. Byer, IEEE J. Quantum Electron. 24, 895 (1988).
    [Crossref]
  4. R. Burnham, A. Hays, Opt. Lett. 14, 27 (1989).
    [Crossref] [PubMed]
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  6. M. Oka, H. Masuda, Y. Kaneda, S. Kubota, in Conference on Lasers and Electro-Optics, Vol. 7 of 1990 OSA Technical Digest Series (Optical Society of America, Washington, D.C., 1990), paper CWC5.
  7. W. Streifer, D. Scifres, G. Harnagel, D. Welch, J. Berger, M. Sakamoto, IEEE J. Quantum Electron. 24, 883 (1988).
    [Crossref]
  8. H. Kogelnik, T. Li, Appl. Opt. 5, 1550 (1966).
    [Crossref] [PubMed]
  9. W. Koechner, Solid-State Laser Engineering (Springer-Verlag, New York, 1988), p. 49.
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    [Crossref]
  11. A. E. Siegman, Lasers (University Science, Mill Valley, Calif., 1986).
  12. W. M. Grossman, M. Gifford, R. W. Wallace, Opt. Lett. 15, 622 (1990).
    [Crossref] [PubMed]

1990 (2)

M. E. Innocenzi, H. T. Yura, C. L. Fincher, R. A. Fields, Appl. Phys. Lett. 56, 1831 (1990).
[Crossref]

W. M. Grossman, M. Gifford, R. W. Wallace, Opt. Lett. 15, 622 (1990).
[Crossref] [PubMed]

1989 (1)

1988 (2)

W. Streifer, D. Scifres, G. Harnagel, D. Welch, J. Berger, M. Sakamoto, IEEE J. Quantum Electron. 24, 883 (1988).
[Crossref]

T. Y. Fan, R. L. Byer, IEEE J. Quantum Electron. 24, 895 (1988).
[Crossref]

1966 (1)

Baer, T.

G. J. Kintz, T. Baer, in Lasers and Electro-Optics Society Annual Meeting (Lasers and Electro-Optics Society, New York, 1989), paper ELT3.5.

Begley, D. L.

D. L. Begley, D. J. Krebs, in Digest of Optical Society of America Annual Meeting (Optical Society of America, Washington, D.C., 1986), paper FD2.

Berger, J.

W. Streifer, D. Scifres, G. Harnagel, D. Welch, J. Berger, M. Sakamoto, IEEE J. Quantum Electron. 24, 883 (1988).
[Crossref]

Burnham, R.

Byer, R. L.

T. Y. Fan, R. L. Byer, IEEE J. Quantum Electron. 24, 895 (1988).
[Crossref]

Fan, T. Y.

T. Y. Fan, R. L. Byer, IEEE J. Quantum Electron. 24, 895 (1988).
[Crossref]

Fields, R. A.

M. E. Innocenzi, H. T. Yura, C. L. Fincher, R. A. Fields, Appl. Phys. Lett. 56, 1831 (1990).
[Crossref]

Fincher, C. L.

M. E. Innocenzi, H. T. Yura, C. L. Fincher, R. A. Fields, Appl. Phys. Lett. 56, 1831 (1990).
[Crossref]

Gifford, M.

Grossman, W. M.

Harnagel, G.

W. Streifer, D. Scifres, G. Harnagel, D. Welch, J. Berger, M. Sakamoto, IEEE J. Quantum Electron. 24, 883 (1988).
[Crossref]

Hays, A.

Innocenzi, M. E.

M. E. Innocenzi, H. T. Yura, C. L. Fincher, R. A. Fields, Appl. Phys. Lett. 56, 1831 (1990).
[Crossref]

Kaneda, Y.

M. Oka, H. Masuda, Y. Kaneda, S. Kubota, in Conference on Lasers and Electro-Optics, Vol. 7 of 1990 OSA Technical Digest Series (Optical Society of America, Washington, D.C., 1990), paper CWC5.

Kintz, G. J.

G. J. Kintz, T. Baer, in Lasers and Electro-Optics Society Annual Meeting (Lasers and Electro-Optics Society, New York, 1989), paper ELT3.5.

Koechner, W.

W. Koechner, Solid-State Laser Engineering (Springer-Verlag, New York, 1988), p. 314.

W. Koechner, Solid-State Laser Engineering (Springer-Verlag, New York, 1988), p. 49.

Kogelnik, H.

Krebs, D. J.

D. L. Begley, D. J. Krebs, in Digest of Optical Society of America Annual Meeting (Optical Society of America, Washington, D.C., 1986), paper FD2.

Kubota, S.

M. Oka, H. Masuda, Y. Kaneda, S. Kubota, in Conference on Lasers and Electro-Optics, Vol. 7 of 1990 OSA Technical Digest Series (Optical Society of America, Washington, D.C., 1990), paper CWC5.

Li, T.

Masuda, H.

M. Oka, H. Masuda, Y. Kaneda, S. Kubota, in Conference on Lasers and Electro-Optics, Vol. 7 of 1990 OSA Technical Digest Series (Optical Society of America, Washington, D.C., 1990), paper CWC5.

Oka, M.

M. Oka, H. Masuda, Y. Kaneda, S. Kubota, in Conference on Lasers and Electro-Optics, Vol. 7 of 1990 OSA Technical Digest Series (Optical Society of America, Washington, D.C., 1990), paper CWC5.

Sakamoto, M.

W. Streifer, D. Scifres, G. Harnagel, D. Welch, J. Berger, M. Sakamoto, IEEE J. Quantum Electron. 24, 883 (1988).
[Crossref]

Scifres, D.

W. Streifer, D. Scifres, G. Harnagel, D. Welch, J. Berger, M. Sakamoto, IEEE J. Quantum Electron. 24, 883 (1988).
[Crossref]

Siegman, A. E.

A. E. Siegman, Lasers (University Science, Mill Valley, Calif., 1986).

Streifer, W.

W. Streifer, D. Scifres, G. Harnagel, D. Welch, J. Berger, M. Sakamoto, IEEE J. Quantum Electron. 24, 883 (1988).
[Crossref]

Wallace, R. W.

Welch, D.

W. Streifer, D. Scifres, G. Harnagel, D. Welch, J. Berger, M. Sakamoto, IEEE J. Quantum Electron. 24, 883 (1988).
[Crossref]

Yura, H. T.

M. E. Innocenzi, H. T. Yura, C. L. Fincher, R. A. Fields, Appl. Phys. Lett. 56, 1831 (1990).
[Crossref]

Appl. Opt. (1)

Appl. Phys. Lett. (1)

M. E. Innocenzi, H. T. Yura, C. L. Fincher, R. A. Fields, Appl. Phys. Lett. 56, 1831 (1990).
[Crossref]

IEEE J. Quantum Electron. (2)

W. Streifer, D. Scifres, G. Harnagel, D. Welch, J. Berger, M. Sakamoto, IEEE J. Quantum Electron. 24, 883 (1988).
[Crossref]

T. Y. Fan, R. L. Byer, IEEE J. Quantum Electron. 24, 895 (1988).
[Crossref]

Opt. Lett. (2)

Other (6)

A. E. Siegman, Lasers (University Science, Mill Valley, Calif., 1986).

D. L. Begley, D. J. Krebs, in Digest of Optical Society of America Annual Meeting (Optical Society of America, Washington, D.C., 1986), paper FD2.

M. Oka, H. Masuda, Y. Kaneda, S. Kubota, in Conference on Lasers and Electro-Optics, Vol. 7 of 1990 OSA Technical Digest Series (Optical Society of America, Washington, D.C., 1990), paper CWC5.

W. Koechner, Solid-State Laser Engineering (Springer-Verlag, New York, 1988), p. 49.

W. Koechner, Solid-State Laser Engineering (Springer-Verlag, New York, 1988), p. 314.

G. J. Kintz, T. Baer, in Lasers and Electro-Optics Society Annual Meeting (Lasers and Electro-Optics Society, New York, 1989), paper ELT3.5.

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Figures (5)

Fig. 1
Fig. 1

Optical arrangement used to focus light from a 10-W laser-diode bar. The distance between rod and cylinder lenses is 1 mm, between the cylinder and the aspheric lenses it is 1 mm, and between the aspheric lens and the Nd:YAG crystal it is 4.5 mm. The optical traces represent the extreme rays from three of the individual emitters within the laser-diode bar. fl, focal length.

Fig. 2
Fig. 2

Schematic of the elliptical-mode resonator. The Brewster-angled surfaces expand the laser mode in the parallel dimension, which permits TEM00 operation while end pumping with a 10-W laser-diode bar.

Fig. 3
Fig. 3

Continuous-wave output power of the elliptical-mode resonator as a function of emitted laser-diode pump power. Slope efficiency, 0.28; threshold, 3.23 W.

Fig. 4
Fig. 4

Effective focal length of the thermally generated lens in the Nd:YAG crystal as a function of collected laser-diode pump power in the (a) parallel and (b) perpendicular dimensions. The rectangular pump spot in addition to non-symmetric heat removal creates an anamorphic lens.

Fig. 5
Fig. 5

Pulse energy versus repetition frequency of the elliptical mode resonator. Epulse = τp[1 − exp(−1/τf)], τ = 171 μs, and p = 2.1 W. The solid curve is a least-squares fit to the data points in Table 1. The pumping parameter p is a measure of the effective amount of diode power converted to 1.06-μm output power (i.e., the cw output power), while τ is the effective upper-state lifetime.

Tables (1)

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Table 1 Q-Switched Results

Equations (1)

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E pulse = τ p [ 1 - exp ( - 1 / τ f ) ] ,

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