Abstract

This is the first report of a recombination laser that has been produced in laser-vaporized target material. Input-laser-pulse energies as low as 0.5 mJ at 1.06 μm and 5 mJ at 10.6 μm have resulted in laser oscillation in Cd i at 1.40, 1.43, 1.45, and 1.64 μm in ≈1-cm-radius cadmium plasmas. This laser appears to have the potential for high efficiency. In addition, scaling of this plasma-recombination process to higher-ionization stages should yield short-wavelength lasers.

© 1979 Optical Society of America

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References

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  1. W. T. Silfvast, L. H. Szeto, O. R. Wood, presented at Tenth International Quantum Electronics Conference, Atlanta, Georgia, May 1978. A short note reporting laser oscillation in Cd ii in a laser-produced cadmium plasma (although not by recombination) was recently published by K. Toyoda, M. Kobiyama, S. Namba, Jpn. J. Appl. Phys. 15, 2033 (1976); however, to date all attempts by the present authors to reproduce this result have been unsuccessful.
    [Crossref]
  2. W. T. Silfvast, L. H. Szeto, O. R. Wood, Appl. Phys. Lett. 31, 334 (1977).
    [Crossref]
  3. C. E. Moore, Atomic Energy Levels: Volume III, Circular of the National Bureau of Standards 467 (U.S. Government Printing Office, Washington D.C., 1958), p. 56.
  4. A. S. Tibiloz, Opt. Spectrosc. 19, 463 (1965); A. N. Dubrovin, A. S. Tibiloz, M. K. Shevtsov, Opt. Spectrosc. 32, 685 (1972).
  5. J. M. Green, W. T. Silfvast, O. R. Wood, J. Appl. Phys. 48, 2753 (1977).
    [Crossref]
  6. J. F. Ready, Opt. Lett. 2, 130 (1978).
    [Crossref] [PubMed]
  7. J. F. Ready, Effects of High Power Laser Radiation (Academic, New York, 1971), p. 194.
  8. Population inversions have been observed in high stages of ionization. See, for example, R. H. Dixon, J. F. Seely, R. C. Elton, Phys. Rev. Lett. 40, 122 (1978).
    [Crossref]

1978 (2)

J. F. Ready, Opt. Lett. 2, 130 (1978).
[Crossref] [PubMed]

Population inversions have been observed in high stages of ionization. See, for example, R. H. Dixon, J. F. Seely, R. C. Elton, Phys. Rev. Lett. 40, 122 (1978).
[Crossref]

1977 (2)

W. T. Silfvast, L. H. Szeto, O. R. Wood, Appl. Phys. Lett. 31, 334 (1977).
[Crossref]

J. M. Green, W. T. Silfvast, O. R. Wood, J. Appl. Phys. 48, 2753 (1977).
[Crossref]

1965 (1)

A. S. Tibiloz, Opt. Spectrosc. 19, 463 (1965); A. N. Dubrovin, A. S. Tibiloz, M. K. Shevtsov, Opt. Spectrosc. 32, 685 (1972).

Dixon, R. H.

Population inversions have been observed in high stages of ionization. See, for example, R. H. Dixon, J. F. Seely, R. C. Elton, Phys. Rev. Lett. 40, 122 (1978).
[Crossref]

Elton, R. C.

Population inversions have been observed in high stages of ionization. See, for example, R. H. Dixon, J. F. Seely, R. C. Elton, Phys. Rev. Lett. 40, 122 (1978).
[Crossref]

Green, J. M.

J. M. Green, W. T. Silfvast, O. R. Wood, J. Appl. Phys. 48, 2753 (1977).
[Crossref]

Moore, C. E.

C. E. Moore, Atomic Energy Levels: Volume III, Circular of the National Bureau of Standards 467 (U.S. Government Printing Office, Washington D.C., 1958), p. 56.

Ready, J. F.

J. F. Ready, Opt. Lett. 2, 130 (1978).
[Crossref] [PubMed]

J. F. Ready, Effects of High Power Laser Radiation (Academic, New York, 1971), p. 194.

Seely, J. F.

Population inversions have been observed in high stages of ionization. See, for example, R. H. Dixon, J. F. Seely, R. C. Elton, Phys. Rev. Lett. 40, 122 (1978).
[Crossref]

Silfvast, W. T.

J. M. Green, W. T. Silfvast, O. R. Wood, J. Appl. Phys. 48, 2753 (1977).
[Crossref]

W. T. Silfvast, L. H. Szeto, O. R. Wood, Appl. Phys. Lett. 31, 334 (1977).
[Crossref]

W. T. Silfvast, L. H. Szeto, O. R. Wood, presented at Tenth International Quantum Electronics Conference, Atlanta, Georgia, May 1978. A short note reporting laser oscillation in Cd ii in a laser-produced cadmium plasma (although not by recombination) was recently published by K. Toyoda, M. Kobiyama, S. Namba, Jpn. J. Appl. Phys. 15, 2033 (1976); however, to date all attempts by the present authors to reproduce this result have been unsuccessful.
[Crossref]

Szeto, L. H.

W. T. Silfvast, L. H. Szeto, O. R. Wood, Appl. Phys. Lett. 31, 334 (1977).
[Crossref]

W. T. Silfvast, L. H. Szeto, O. R. Wood, presented at Tenth International Quantum Electronics Conference, Atlanta, Georgia, May 1978. A short note reporting laser oscillation in Cd ii in a laser-produced cadmium plasma (although not by recombination) was recently published by K. Toyoda, M. Kobiyama, S. Namba, Jpn. J. Appl. Phys. 15, 2033 (1976); however, to date all attempts by the present authors to reproduce this result have been unsuccessful.
[Crossref]

Tibiloz, A. S.

A. S. Tibiloz, Opt. Spectrosc. 19, 463 (1965); A. N. Dubrovin, A. S. Tibiloz, M. K. Shevtsov, Opt. Spectrosc. 32, 685 (1972).

Wood, O. R.

J. M. Green, W. T. Silfvast, O. R. Wood, J. Appl. Phys. 48, 2753 (1977).
[Crossref]

W. T. Silfvast, L. H. Szeto, O. R. Wood, Appl. Phys. Lett. 31, 334 (1977).
[Crossref]

W. T. Silfvast, L. H. Szeto, O. R. Wood, presented at Tenth International Quantum Electronics Conference, Atlanta, Georgia, May 1978. A short note reporting laser oscillation in Cd ii in a laser-produced cadmium plasma (although not by recombination) was recently published by K. Toyoda, M. Kobiyama, S. Namba, Jpn. J. Appl. Phys. 15, 2033 (1976); however, to date all attempts by the present authors to reproduce this result have been unsuccessful.
[Crossref]

Appl. Phys. Lett. (1)

W. T. Silfvast, L. H. Szeto, O. R. Wood, Appl. Phys. Lett. 31, 334 (1977).
[Crossref]

J. Appl. Phys. (1)

J. M. Green, W. T. Silfvast, O. R. Wood, J. Appl. Phys. 48, 2753 (1977).
[Crossref]

Opt. Lett. (1)

Opt. Spectrosc. (1)

A. S. Tibiloz, Opt. Spectrosc. 19, 463 (1965); A. N. Dubrovin, A. S. Tibiloz, M. K. Shevtsov, Opt. Spectrosc. 32, 685 (1972).

Phys. Rev. Lett. (1)

Population inversions have been observed in high stages of ionization. See, for example, R. H. Dixon, J. F. Seely, R. C. Elton, Phys. Rev. Lett. 40, 122 (1978).
[Crossref]

Other (3)

J. F. Ready, Effects of High Power Laser Radiation (Academic, New York, 1971), p. 194.

W. T. Silfvast, L. H. Szeto, O. R. Wood, presented at Tenth International Quantum Electronics Conference, Atlanta, Georgia, May 1978. A short note reporting laser oscillation in Cd ii in a laser-produced cadmium plasma (although not by recombination) was recently published by K. Toyoda, M. Kobiyama, S. Namba, Jpn. J. Appl. Phys. 15, 2033 (1976); however, to date all attempts by the present authors to reproduce this result have been unsuccessful.
[Crossref]

C. E. Moore, Atomic Energy Levels: Volume III, Circular of the National Bureau of Standards 467 (U.S. Government Printing Office, Washington D.C., 1958), p. 56.

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Figures (4)

Fig. 1
Fig. 1

Experimental arrangement for producing a plasma-recombination laser in cadmium together with a photograph of a CO2-laser-produced cadmium plasma.

Fig. 2
Fig. 2

Energy-level diagram for neutral cadmium showing the location of the laser transitions.

Fig. 3
Fig. 3

Oscilloscope traces of near-infrared laser outputs from cadmium plasmas created with three different input energies from a 10.6-μm source and three different input energies from a 1.06-μm source. Increasing laser output is in a downward direction.

Fig. 4
Fig. 4

Dependence of cadmium laser output (a) on helium pressure for 10.6- and 1.06-μm sourcesand (b) on air pressure and on helium pressure for a 10.6-μm source.

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