Abstract

We demonstrate an efficient Nd:YAG laser end pumped by a high-power (135-W peak power) three-bar diode-laser array. We have achieved an unpolarized TEM00-mode output energy of 6.7 mJ/pulse for a 27-mJ pump pulse. The optical-to-optical slope efficiency of the energy impinging upon the laser rod is 38% for round-trip losses of 2.4% and a 5% transmissive output coupler. The attainable multimode output energy is 8.4 mJ/pulse. We have also designed and constructed an optics module that efficiently concentrates the pumping radiation in the resonator mode region. This optics is a key component for this laser.

© 1992 Optical Society of America

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References

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  1. T. Y. Fan, R. L. Byer, IEEE J. Quantum Electron. 24, 895 (1988).
    [CrossRef]
  2. R. L. Burnham, Opt. Photon. News 1(8), 4 (1990).
    [CrossRef]
  3. S. C. Tidwell, J. F. Seamans, J. Zumdieck, D. D. Lowenthal, in Digest of Conference on Advanced Solid-State Lasers (Optical Society of America, Washington, D.C., 1992), p. 179.
  4. J. G. Endriz, M. Vakili, G. S. Browder, M. De Vito, J. M. Haden, G. L. Harnagel, W. E. Plano, M. Sakamoto, D. F. Welch, S. Willing, D. P. Worland, H. C. Yao, IEEE J. Quantum Electron. 28, 952 (1992).
    [CrossRef]
  5. W. T. Welford, R. Winston, The Optics of Nonimaging Concentrators, Light and Solar Energy (Academic, New York, 1978).
  6. D. Findlay, R. A. Clay, Phys. Lett. 20, 277 (1966).
    [CrossRef]
  7. D. Welford, D. M. Rines, B. J. Dinerman, Opt. Lett. 16, 1850 (1991).
    [CrossRef] [PubMed]
  8. L. R. Marshall, A. Kaz, R. L. Burnham, Opt. Lett. 17, 186 (1992).
    [CrossRef] [PubMed]
  9. R. D. Mead, S. C. Tidwell, D. D. Lowenthal, in Digest of Conference on Advanced Solid-State Lasers (Optical Society of America, Washington, D.C., 1992), p. 200.
  10. Using two reflective thin-film polarizers inserted into the same cavity, we obtained a slope efficiency of 29.2% and an external optical-to-optical conversion efficiency of 18.5%.

1992 (2)

J. G. Endriz, M. Vakili, G. S. Browder, M. De Vito, J. M. Haden, G. L. Harnagel, W. E. Plano, M. Sakamoto, D. F. Welch, S. Willing, D. P. Worland, H. C. Yao, IEEE J. Quantum Electron. 28, 952 (1992).
[CrossRef]

L. R. Marshall, A. Kaz, R. L. Burnham, Opt. Lett. 17, 186 (1992).
[CrossRef] [PubMed]

1991 (1)

1990 (1)

R. L. Burnham, Opt. Photon. News 1(8), 4 (1990).
[CrossRef]

1988 (1)

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

1966 (1)

D. Findlay, R. A. Clay, Phys. Lett. 20, 277 (1966).
[CrossRef]

Browder, G. S.

J. G. Endriz, M. Vakili, G. S. Browder, M. De Vito, J. M. Haden, G. L. Harnagel, W. E. Plano, M. Sakamoto, D. F. Welch, S. Willing, D. P. Worland, H. C. Yao, IEEE J. Quantum Electron. 28, 952 (1992).
[CrossRef]

Burnham, R. L.

Byer, R. L.

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

Clay, R. A.

D. Findlay, R. A. Clay, Phys. Lett. 20, 277 (1966).
[CrossRef]

De Vito, M.

J. G. Endriz, M. Vakili, G. S. Browder, M. De Vito, J. M. Haden, G. L. Harnagel, W. E. Plano, M. Sakamoto, D. F. Welch, S. Willing, D. P. Worland, H. C. Yao, IEEE J. Quantum Electron. 28, 952 (1992).
[CrossRef]

Dinerman, B. J.

Endriz, J. G.

J. G. Endriz, M. Vakili, G. S. Browder, M. De Vito, J. M. Haden, G. L. Harnagel, W. E. Plano, M. Sakamoto, D. F. Welch, S. Willing, D. P. Worland, H. C. Yao, IEEE J. Quantum Electron. 28, 952 (1992).
[CrossRef]

Fan, T. Y.

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

Findlay, D.

D. Findlay, R. A. Clay, Phys. Lett. 20, 277 (1966).
[CrossRef]

Haden, J. M.

J. G. Endriz, M. Vakili, G. S. Browder, M. De Vito, J. M. Haden, G. L. Harnagel, W. E. Plano, M. Sakamoto, D. F. Welch, S. Willing, D. P. Worland, H. C. Yao, IEEE J. Quantum Electron. 28, 952 (1992).
[CrossRef]

Harnagel, G. L.

J. G. Endriz, M. Vakili, G. S. Browder, M. De Vito, J. M. Haden, G. L. Harnagel, W. E. Plano, M. Sakamoto, D. F. Welch, S. Willing, D. P. Worland, H. C. Yao, IEEE J. Quantum Electron. 28, 952 (1992).
[CrossRef]

Kaz, A.

Lowenthal, D. D.

R. D. Mead, S. C. Tidwell, D. D. Lowenthal, in Digest of Conference on Advanced Solid-State Lasers (Optical Society of America, Washington, D.C., 1992), p. 200.

S. C. Tidwell, J. F. Seamans, J. Zumdieck, D. D. Lowenthal, in Digest of Conference on Advanced Solid-State Lasers (Optical Society of America, Washington, D.C., 1992), p. 179.

Marshall, L. R.

Mead, R. D.

R. D. Mead, S. C. Tidwell, D. D. Lowenthal, in Digest of Conference on Advanced Solid-State Lasers (Optical Society of America, Washington, D.C., 1992), p. 200.

Plano, W. E.

J. G. Endriz, M. Vakili, G. S. Browder, M. De Vito, J. M. Haden, G. L. Harnagel, W. E. Plano, M. Sakamoto, D. F. Welch, S. Willing, D. P. Worland, H. C. Yao, IEEE J. Quantum Electron. 28, 952 (1992).
[CrossRef]

Rines, D. M.

Sakamoto, M.

J. G. Endriz, M. Vakili, G. S. Browder, M. De Vito, J. M. Haden, G. L. Harnagel, W. E. Plano, M. Sakamoto, D. F. Welch, S. Willing, D. P. Worland, H. C. Yao, IEEE J. Quantum Electron. 28, 952 (1992).
[CrossRef]

Seamans, J. F.

S. C. Tidwell, J. F. Seamans, J. Zumdieck, D. D. Lowenthal, in Digest of Conference on Advanced Solid-State Lasers (Optical Society of America, Washington, D.C., 1992), p. 179.

Tidwell, S. C.

S. C. Tidwell, J. F. Seamans, J. Zumdieck, D. D. Lowenthal, in Digest of Conference on Advanced Solid-State Lasers (Optical Society of America, Washington, D.C., 1992), p. 179.

R. D. Mead, S. C. Tidwell, D. D. Lowenthal, in Digest of Conference on Advanced Solid-State Lasers (Optical Society of America, Washington, D.C., 1992), p. 200.

Vakili, M.

J. G. Endriz, M. Vakili, G. S. Browder, M. De Vito, J. M. Haden, G. L. Harnagel, W. E. Plano, M. Sakamoto, D. F. Welch, S. Willing, D. P. Worland, H. C. Yao, IEEE J. Quantum Electron. 28, 952 (1992).
[CrossRef]

Welch, D. F.

J. G. Endriz, M. Vakili, G. S. Browder, M. De Vito, J. M. Haden, G. L. Harnagel, W. E. Plano, M. Sakamoto, D. F. Welch, S. Willing, D. P. Worland, H. C. Yao, IEEE J. Quantum Electron. 28, 952 (1992).
[CrossRef]

Welford, D.

Welford, W. T.

W. T. Welford, R. Winston, The Optics of Nonimaging Concentrators, Light and Solar Energy (Academic, New York, 1978).

Willing, S.

J. G. Endriz, M. Vakili, G. S. Browder, M. De Vito, J. M. Haden, G. L. Harnagel, W. E. Plano, M. Sakamoto, D. F. Welch, S. Willing, D. P. Worland, H. C. Yao, IEEE J. Quantum Electron. 28, 952 (1992).
[CrossRef]

Winston, R.

W. T. Welford, R. Winston, The Optics of Nonimaging Concentrators, Light and Solar Energy (Academic, New York, 1978).

Worland, D. P.

J. G. Endriz, M. Vakili, G. S. Browder, M. De Vito, J. M. Haden, G. L. Harnagel, W. E. Plano, M. Sakamoto, D. F. Welch, S. Willing, D. P. Worland, H. C. Yao, IEEE J. Quantum Electron. 28, 952 (1992).
[CrossRef]

Yao, H. C.

J. G. Endriz, M. Vakili, G. S. Browder, M. De Vito, J. M. Haden, G. L. Harnagel, W. E. Plano, M. Sakamoto, D. F. Welch, S. Willing, D. P. Worland, H. C. Yao, IEEE J. Quantum Electron. 28, 952 (1992).
[CrossRef]

Zumdieck, J.

S. C. Tidwell, J. F. Seamans, J. Zumdieck, D. D. Lowenthal, in Digest of Conference on Advanced Solid-State Lasers (Optical Society of America, Washington, D.C., 1992), p. 179.

IEEE J. Quantum Electron. (2)

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

J. G. Endriz, M. Vakili, G. S. Browder, M. De Vito, J. M. Haden, G. L. Harnagel, W. E. Plano, M. Sakamoto, D. F. Welch, S. Willing, D. P. Worland, H. C. Yao, IEEE J. Quantum Electron. 28, 952 (1992).
[CrossRef]

Opt. Lett. (2)

Opt. Photon. News (1)

R. L. Burnham, Opt. Photon. News 1(8), 4 (1990).
[CrossRef]

Phys. Lett. (1)

D. Findlay, R. A. Clay, Phys. Lett. 20, 277 (1966).
[CrossRef]

Other (4)

S. C. Tidwell, J. F. Seamans, J. Zumdieck, D. D. Lowenthal, in Digest of Conference on Advanced Solid-State Lasers (Optical Society of America, Washington, D.C., 1992), p. 179.

W. T. Welford, R. Winston, The Optics of Nonimaging Concentrators, Light and Solar Energy (Academic, New York, 1978).

R. D. Mead, S. C. Tidwell, D. D. Lowenthal, in Digest of Conference on Advanced Solid-State Lasers (Optical Society of America, Washington, D.C., 1992), p. 200.

Using two reflective thin-film polarizers inserted into the same cavity, we obtained a slope efficiency of 29.2% and an external optical-to-optical conversion efficiency of 18.5%.

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Figures (5)

Fig. 1
Fig. 1

Laser layout. OC, flat output coupler; Rc, radius of curvature; HT, highly transmitting; HR, highly reflecting. The Nd:YAG (1 at. % Nd) laser crystal is 6.25 mm in diameter and 10 mm in length.

Fig. 2
Fig. 2

End-pumping optics and ray-tracing plot. (a) View in the direction of the bars, (b) view perpendicular to the bars. DLA, three-bar DL array; LR, laser rod.

Fig. 3
Fig. 3

Plot of the pump energy distribution at the pump end of the laser rod (a) in the direction parallel to the DL array bars with a 15-μm slit and (b) perpendicular to the bars. The pinhole used for mapping this distribution had a diameter of 10 μm.

Fig. 4
Fig. 4

Laser performance for TEM00-mode operation. The output coupler has a reflectivity of 95% at 1064 nm. The abscissa shows the actual pumping energy after the end-pumping optics.

Fig. 5
Fig. 5

Measured spatial profile of the output beam at an output energy of ~7 mJ/pulse, which demonstrates a nearly TEM00 Gaussian mode.

Equations (1)

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η s = η p η a η qe ( λ p / λ L ) T p T oc / ( T oc + L ) ,

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