Abstract

Direct solar illumination was used to pump a 5-mm-diameter 62-mm exposed-length rod of Er,Tm,Ho:YAG to achieve a quasi-cw lasing of the Ho ion at an average power of 12 W. The solar radiation was chopped at a 20% duty cycle to avoid overloading of the cooling system. The peak power output was more than 65 W during the chopper's open times. The slope efficiency is 3.8%, and the threshold input energy is approximately 100 W. The laser was operated for long times (up to hours) while maintaining its performance. This is, to our knowledge, the first directly solar-pumped laser operating at 77 K.

© 1990 Optical Society of America

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References

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  1. G. J. Kintz, R. Allen, L. Esterowitz, in Digest of Conference of Lasers and Electro-Optics (Optical Society of America, Washington, D.C., 1987), postdeadline paper ThU4.
  2. G. Huber, P. Mitzschelich, T. Y. Fan, R. L. Byer, J. Lumin. 40/41, 509 (1988).
    [CrossRef]
  3. H. Loten, Y. Kalisky, J. Kagan, D. Sagie, IEEE J. Quantum Electron. 24, 1193 (1988).
    [CrossRef]
  4. L. F. Johnson, J. E. Geusic, L. G. VanUitert, Appl. Phys. Lett. 7, 127 (1965).
    [CrossRef]
  5. M. Weksler, J. Shwartz, IEEE J. Quantum Electron. 24, 1222 (1988).
    [CrossRef]
  6. Y. Noter, M. Oron, J. Shwartz, M. Weksler, A. Yogev, Proc. Soc. Photo-Opt. Instrum. Eng. 1038, 512 (1988).
  7. H. Bernstein, E. Kritchman, Y. Noter, M. Oron, M. Weksler, A. Yogev, Proc. Soc. Photo-Opt. Instrum. Eng. 1038, 638 (1988).
  8. W. T. Welford, R. Winston, The Optics of Nonimaging Concentrators (Academic, New York, 1978).

1988 (5)

G. Huber, P. Mitzschelich, T. Y. Fan, R. L. Byer, J. Lumin. 40/41, 509 (1988).
[CrossRef]

H. Loten, Y. Kalisky, J. Kagan, D. Sagie, IEEE J. Quantum Electron. 24, 1193 (1988).
[CrossRef]

M. Weksler, J. Shwartz, IEEE J. Quantum Electron. 24, 1222 (1988).
[CrossRef]

Y. Noter, M. Oron, J. Shwartz, M. Weksler, A. Yogev, Proc. Soc. Photo-Opt. Instrum. Eng. 1038, 512 (1988).

H. Bernstein, E. Kritchman, Y. Noter, M. Oron, M. Weksler, A. Yogev, Proc. Soc. Photo-Opt. Instrum. Eng. 1038, 638 (1988).

1965 (1)

L. F. Johnson, J. E. Geusic, L. G. VanUitert, Appl. Phys. Lett. 7, 127 (1965).
[CrossRef]

Allen, R.

G. J. Kintz, R. Allen, L. Esterowitz, in Digest of Conference of Lasers and Electro-Optics (Optical Society of America, Washington, D.C., 1987), postdeadline paper ThU4.

Bernstein, H.

H. Bernstein, E. Kritchman, Y. Noter, M. Oron, M. Weksler, A. Yogev, Proc. Soc. Photo-Opt. Instrum. Eng. 1038, 638 (1988).

Byer, R. L.

G. Huber, P. Mitzschelich, T. Y. Fan, R. L. Byer, J. Lumin. 40/41, 509 (1988).
[CrossRef]

Esterowitz, L.

G. J. Kintz, R. Allen, L. Esterowitz, in Digest of Conference of Lasers and Electro-Optics (Optical Society of America, Washington, D.C., 1987), postdeadline paper ThU4.

Fan, T. Y.

G. Huber, P. Mitzschelich, T. Y. Fan, R. L. Byer, J. Lumin. 40/41, 509 (1988).
[CrossRef]

Geusic, J. E.

L. F. Johnson, J. E. Geusic, L. G. VanUitert, Appl. Phys. Lett. 7, 127 (1965).
[CrossRef]

Huber, G.

G. Huber, P. Mitzschelich, T. Y. Fan, R. L. Byer, J. Lumin. 40/41, 509 (1988).
[CrossRef]

Johnson, L. F.

L. F. Johnson, J. E. Geusic, L. G. VanUitert, Appl. Phys. Lett. 7, 127 (1965).
[CrossRef]

Kagan, J.

H. Loten, Y. Kalisky, J. Kagan, D. Sagie, IEEE J. Quantum Electron. 24, 1193 (1988).
[CrossRef]

Kalisky, Y.

H. Loten, Y. Kalisky, J. Kagan, D. Sagie, IEEE J. Quantum Electron. 24, 1193 (1988).
[CrossRef]

Kintz, G. J.

G. J. Kintz, R. Allen, L. Esterowitz, in Digest of Conference of Lasers and Electro-Optics (Optical Society of America, Washington, D.C., 1987), postdeadline paper ThU4.

Kritchman, E.

H. Bernstein, E. Kritchman, Y. Noter, M. Oron, M. Weksler, A. Yogev, Proc. Soc. Photo-Opt. Instrum. Eng. 1038, 638 (1988).

Loten, H.

H. Loten, Y. Kalisky, J. Kagan, D. Sagie, IEEE J. Quantum Electron. 24, 1193 (1988).
[CrossRef]

Mitzschelich, P.

G. Huber, P. Mitzschelich, T. Y. Fan, R. L. Byer, J. Lumin. 40/41, 509 (1988).
[CrossRef]

Noter, Y.

Y. Noter, M. Oron, J. Shwartz, M. Weksler, A. Yogev, Proc. Soc. Photo-Opt. Instrum. Eng. 1038, 512 (1988).

H. Bernstein, E. Kritchman, Y. Noter, M. Oron, M. Weksler, A. Yogev, Proc. Soc. Photo-Opt. Instrum. Eng. 1038, 638 (1988).

Oron, M.

H. Bernstein, E. Kritchman, Y. Noter, M. Oron, M. Weksler, A. Yogev, Proc. Soc. Photo-Opt. Instrum. Eng. 1038, 638 (1988).

Y. Noter, M. Oron, J. Shwartz, M. Weksler, A. Yogev, Proc. Soc. Photo-Opt. Instrum. Eng. 1038, 512 (1988).

Sagie, D.

H. Loten, Y. Kalisky, J. Kagan, D. Sagie, IEEE J. Quantum Electron. 24, 1193 (1988).
[CrossRef]

Shwartz, J.

Y. Noter, M. Oron, J. Shwartz, M. Weksler, A. Yogev, Proc. Soc. Photo-Opt. Instrum. Eng. 1038, 512 (1988).

M. Weksler, J. Shwartz, IEEE J. Quantum Electron. 24, 1222 (1988).
[CrossRef]

VanUitert, L. G.

L. F. Johnson, J. E. Geusic, L. G. VanUitert, Appl. Phys. Lett. 7, 127 (1965).
[CrossRef]

Weksler, M.

M. Weksler, J. Shwartz, IEEE J. Quantum Electron. 24, 1222 (1988).
[CrossRef]

H. Bernstein, E. Kritchman, Y. Noter, M. Oron, M. Weksler, A. Yogev, Proc. Soc. Photo-Opt. Instrum. Eng. 1038, 638 (1988).

Y. Noter, M. Oron, J. Shwartz, M. Weksler, A. Yogev, Proc. Soc. Photo-Opt. Instrum. Eng. 1038, 512 (1988).

Welford, W. T.

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

Winston, R.

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

Yogev, A.

H. Bernstein, E. Kritchman, Y. Noter, M. Oron, M. Weksler, A. Yogev, Proc. Soc. Photo-Opt. Instrum. Eng. 1038, 638 (1988).

Y. Noter, M. Oron, J. Shwartz, M. Weksler, A. Yogev, Proc. Soc. Photo-Opt. Instrum. Eng. 1038, 512 (1988).

Appl. Phys. Lett. (1)

L. F. Johnson, J. E. Geusic, L. G. VanUitert, Appl. Phys. Lett. 7, 127 (1965).
[CrossRef]

IEEE J. Quantum Electron. (2)

M. Weksler, J. Shwartz, IEEE J. Quantum Electron. 24, 1222 (1988).
[CrossRef]

H. Loten, Y. Kalisky, J. Kagan, D. Sagie, IEEE J. Quantum Electron. 24, 1193 (1988).
[CrossRef]

J. Lumin. (1)

G. Huber, P. Mitzschelich, T. Y. Fan, R. L. Byer, J. Lumin. 40/41, 509 (1988).
[CrossRef]

Proc. Soc. Photo-Opt. Instrum. Eng. (2)

Y. Noter, M. Oron, J. Shwartz, M. Weksler, A. Yogev, Proc. Soc. Photo-Opt. Instrum. Eng. 1038, 512 (1988).

H. Bernstein, E. Kritchman, Y. Noter, M. Oron, M. Weksler, A. Yogev, Proc. Soc. Photo-Opt. Instrum. Eng. 1038, 638 (1988).

Other (2)

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

G. J. Kintz, R. Allen, L. Esterowitz, in Digest of Conference of Lasers and Electro-Optics (Optical Society of America, Washington, D.C., 1987), postdeadline paper ThU4.

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Figures (6)

Fig. 1
Fig. 1

Schematic of the experimental setup. P.C., personal computer.

Fig. 2
Fig. 2

Laser cavity. P.DIODE, photodiode.

Fig. 3
Fig. 3

Solar-pumped output laser powers for 5-msec duration and 20% duty cycle exposures. The percentages are the output coupling parameters.

Fig. 4
Fig. 4

Increase of exposure time from 5 to 7.2 msec at 20% output coupling.

Fig. 5
Fig. 5

Increase of exposure time from 5 to 9.55 msec at 30% output coupling.

Fig. 6
Fig. 6

Time history of the laser pulse versus the chopper opening. The upper curves are the chopper opening times, and the lower curves are the corresponding laser outputs.

Tables (1)

Tables Icon

Table 1 Parameters Measured for 5-msec, 20% Duty Cycle Exposures

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