Abstract

A fast-axial-flow rf-discharge-excited CO laser has been scaled up to produce an output power of more than 1 kW at room temperature (280–290 K). The discharge section is composed of eight discharge tubes, to which rf power is capacitively coupled. An output power of 1220 W is obtained with an Xe-added mixture, with corresponding electrical conversion efficiency and specific output of 7.9% and 1.8 W/cm3, respectively. Scaling characteristics of the scheme are discussed. The temperature dependence of the output, the output stability, and the beam properties are also reported.

© 1996 Optical Society of America

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References

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  1. F. Maisenhälder, in Proceedings of the International Conference on Laser Advanced Materials Processing (High Temperature Society of Japan, Osaka, 1992), p. 43.
  2. M. Schellhorn, H. von Bülow, Proc. Soc. Photo-Opt. Instrum. Eng. 2502, 664 (1994).
  3. B. A. Mehmetli, K. Takahashi, S. Sato, “Comparison of aluminum alloys’ welding characteristics with 1 kW CO and CO2 lasers ,” J. Laser Applications (to be published).
  4. R. M. Osgood, W. C. Eppers, Appl. Phys. Lett. 13, 409 (1968).
    [CrossRef]
  5. S. Sato, K. Takahashi, I. Tanaka, O. Noda, S. Kuribayashi, S. Imatake, M. Kondo, Proc. Soc. Photo-Opt. Instrum. Eng. 1397, 421 (1990).
  6. S. Sato, M. Taniwaki, Appl. Phys. Lett. 61, 621 (1992).
    [CrossRef]
  7. J. W. Rich, H. M. Thompson, C. E. Treanor, J. W. Daiber, Appl. Phys. Lett. 19, 230 (1971).
    [CrossRef]
  8. H. von Bülow, M. Schellhorn, Appl. Phys. Lett. 63, 287 (1993).
    [CrossRef]
  9. X. Luo, J. H. Schäfer, J. Uhlenbusch, Opt. Commun. 102, 65 (1993).
    [CrossRef]
  10. M. Uehara, H. Kanazawa, Appl. Phys. Lett. 65, 22 (1994).
    [CrossRef]
  11. K. Shimizu, S. Sato, Jpn. J. Appl. Phys. 33, L180 (1994).
    [CrossRef]
  12. S. Sato, K. Shimizu, K. Shimamoto, Opt. Lett. 19, 719 (1994).
    [CrossRef] [PubMed]
  13. K. Shimizu, S. Sato, K. Shimamoto, Y. Takahashi, Proc. Soc. Photo-Opt. Instrum. Eng. 2118, 83 (1994).

1994 (5)

M. Schellhorn, H. von Bülow, Proc. Soc. Photo-Opt. Instrum. Eng. 2502, 664 (1994).

M. Uehara, H. Kanazawa, Appl. Phys. Lett. 65, 22 (1994).
[CrossRef]

K. Shimizu, S. Sato, Jpn. J. Appl. Phys. 33, L180 (1994).
[CrossRef]

K. Shimizu, S. Sato, K. Shimamoto, Y. Takahashi, Proc. Soc. Photo-Opt. Instrum. Eng. 2118, 83 (1994).

S. Sato, K. Shimizu, K. Shimamoto, Opt. Lett. 19, 719 (1994).
[CrossRef] [PubMed]

1993 (2)

H. von Bülow, M. Schellhorn, Appl. Phys. Lett. 63, 287 (1993).
[CrossRef]

X. Luo, J. H. Schäfer, J. Uhlenbusch, Opt. Commun. 102, 65 (1993).
[CrossRef]

1992 (1)

S. Sato, M. Taniwaki, Appl. Phys. Lett. 61, 621 (1992).
[CrossRef]

1990 (1)

S. Sato, K. Takahashi, I. Tanaka, O. Noda, S. Kuribayashi, S. Imatake, M. Kondo, Proc. Soc. Photo-Opt. Instrum. Eng. 1397, 421 (1990).

1971 (1)

J. W. Rich, H. M. Thompson, C. E. Treanor, J. W. Daiber, Appl. Phys. Lett. 19, 230 (1971).
[CrossRef]

1968 (1)

R. M. Osgood, W. C. Eppers, Appl. Phys. Lett. 13, 409 (1968).
[CrossRef]

Daiber, J. W.

J. W. Rich, H. M. Thompson, C. E. Treanor, J. W. Daiber, Appl. Phys. Lett. 19, 230 (1971).
[CrossRef]

Eppers, W. C.

R. M. Osgood, W. C. Eppers, Appl. Phys. Lett. 13, 409 (1968).
[CrossRef]

Imatake, S.

S. Sato, K. Takahashi, I. Tanaka, O. Noda, S. Kuribayashi, S. Imatake, M. Kondo, Proc. Soc. Photo-Opt. Instrum. Eng. 1397, 421 (1990).

Kanazawa, H.

M. Uehara, H. Kanazawa, Appl. Phys. Lett. 65, 22 (1994).
[CrossRef]

Kondo, M.

S. Sato, K. Takahashi, I. Tanaka, O. Noda, S. Kuribayashi, S. Imatake, M. Kondo, Proc. Soc. Photo-Opt. Instrum. Eng. 1397, 421 (1990).

Kuribayashi, S.

S. Sato, K. Takahashi, I. Tanaka, O. Noda, S. Kuribayashi, S. Imatake, M. Kondo, Proc. Soc. Photo-Opt. Instrum. Eng. 1397, 421 (1990).

Luo, X.

X. Luo, J. H. Schäfer, J. Uhlenbusch, Opt. Commun. 102, 65 (1993).
[CrossRef]

Maisenhälder, F.

F. Maisenhälder, in Proceedings of the International Conference on Laser Advanced Materials Processing (High Temperature Society of Japan, Osaka, 1992), p. 43.

Mehmetli, B. A.

B. A. Mehmetli, K. Takahashi, S. Sato, “Comparison of aluminum alloys’ welding characteristics with 1 kW CO and CO2 lasers ,” J. Laser Applications (to be published).

Noda, O.

S. Sato, K. Takahashi, I. Tanaka, O. Noda, S. Kuribayashi, S. Imatake, M. Kondo, Proc. Soc. Photo-Opt. Instrum. Eng. 1397, 421 (1990).

Osgood, R. M.

R. M. Osgood, W. C. Eppers, Appl. Phys. Lett. 13, 409 (1968).
[CrossRef]

Rich, J. W.

J. W. Rich, H. M. Thompson, C. E. Treanor, J. W. Daiber, Appl. Phys. Lett. 19, 230 (1971).
[CrossRef]

Sato, S.

K. Shimizu, S. Sato, Jpn. J. Appl. Phys. 33, L180 (1994).
[CrossRef]

K. Shimizu, S. Sato, K. Shimamoto, Y. Takahashi, Proc. Soc. Photo-Opt. Instrum. Eng. 2118, 83 (1994).

S. Sato, K. Shimizu, K. Shimamoto, Opt. Lett. 19, 719 (1994).
[CrossRef] [PubMed]

S. Sato, M. Taniwaki, Appl. Phys. Lett. 61, 621 (1992).
[CrossRef]

S. Sato, K. Takahashi, I. Tanaka, O. Noda, S. Kuribayashi, S. Imatake, M. Kondo, Proc. Soc. Photo-Opt. Instrum. Eng. 1397, 421 (1990).

B. A. Mehmetli, K. Takahashi, S. Sato, “Comparison of aluminum alloys’ welding characteristics with 1 kW CO and CO2 lasers ,” J. Laser Applications (to be published).

Schäfer, J. H.

X. Luo, J. H. Schäfer, J. Uhlenbusch, Opt. Commun. 102, 65 (1993).
[CrossRef]

Schellhorn, M.

M. Schellhorn, H. von Bülow, Proc. Soc. Photo-Opt. Instrum. Eng. 2502, 664 (1994).

H. von Bülow, M. Schellhorn, Appl. Phys. Lett. 63, 287 (1993).
[CrossRef]

Shimamoto, K.

S. Sato, K. Shimizu, K. Shimamoto, Opt. Lett. 19, 719 (1994).
[CrossRef] [PubMed]

K. Shimizu, S. Sato, K. Shimamoto, Y. Takahashi, Proc. Soc. Photo-Opt. Instrum. Eng. 2118, 83 (1994).

Shimizu, K.

K. Shimizu, S. Sato, K. Shimamoto, Y. Takahashi, Proc. Soc. Photo-Opt. Instrum. Eng. 2118, 83 (1994).

K. Shimizu, S. Sato, Jpn. J. Appl. Phys. 33, L180 (1994).
[CrossRef]

S. Sato, K. Shimizu, K. Shimamoto, Opt. Lett. 19, 719 (1994).
[CrossRef] [PubMed]

Takahashi, K.

S. Sato, K. Takahashi, I. Tanaka, O. Noda, S. Kuribayashi, S. Imatake, M. Kondo, Proc. Soc. Photo-Opt. Instrum. Eng. 1397, 421 (1990).

B. A. Mehmetli, K. Takahashi, S. Sato, “Comparison of aluminum alloys’ welding characteristics with 1 kW CO and CO2 lasers ,” J. Laser Applications (to be published).

Takahashi, Y.

K. Shimizu, S. Sato, K. Shimamoto, Y. Takahashi, Proc. Soc. Photo-Opt. Instrum. Eng. 2118, 83 (1994).

Tanaka, I.

S. Sato, K. Takahashi, I. Tanaka, O. Noda, S. Kuribayashi, S. Imatake, M. Kondo, Proc. Soc. Photo-Opt. Instrum. Eng. 1397, 421 (1990).

Taniwaki, M.

S. Sato, M. Taniwaki, Appl. Phys. Lett. 61, 621 (1992).
[CrossRef]

Thompson, H. M.

J. W. Rich, H. M. Thompson, C. E. Treanor, J. W. Daiber, Appl. Phys. Lett. 19, 230 (1971).
[CrossRef]

Treanor, C. E.

J. W. Rich, H. M. Thompson, C. E. Treanor, J. W. Daiber, Appl. Phys. Lett. 19, 230 (1971).
[CrossRef]

Uehara, M.

M. Uehara, H. Kanazawa, Appl. Phys. Lett. 65, 22 (1994).
[CrossRef]

Uhlenbusch, J.

X. Luo, J. H. Schäfer, J. Uhlenbusch, Opt. Commun. 102, 65 (1993).
[CrossRef]

von Bülow, H.

M. Schellhorn, H. von Bülow, Proc. Soc. Photo-Opt. Instrum. Eng. 2502, 664 (1994).

H. von Bülow, M. Schellhorn, Appl. Phys. Lett. 63, 287 (1993).
[CrossRef]

Appl. Phys. Lett. (5)

R. M. Osgood, W. C. Eppers, Appl. Phys. Lett. 13, 409 (1968).
[CrossRef]

S. Sato, M. Taniwaki, Appl. Phys. Lett. 61, 621 (1992).
[CrossRef]

J. W. Rich, H. M. Thompson, C. E. Treanor, J. W. Daiber, Appl. Phys. Lett. 19, 230 (1971).
[CrossRef]

H. von Bülow, M. Schellhorn, Appl. Phys. Lett. 63, 287 (1993).
[CrossRef]

M. Uehara, H. Kanazawa, Appl. Phys. Lett. 65, 22 (1994).
[CrossRef]

Jpn. J. Appl. Phys. (1)

K. Shimizu, S. Sato, Jpn. J. Appl. Phys. 33, L180 (1994).
[CrossRef]

Opt. Commun. (1)

X. Luo, J. H. Schäfer, J. Uhlenbusch, Opt. Commun. 102, 65 (1993).
[CrossRef]

Opt. Lett. (1)

Proc. Soc. Photo-Opt. Instrum. Eng. (3)

K. Shimizu, S. Sato, K. Shimamoto, Y. Takahashi, Proc. Soc. Photo-Opt. Instrum. Eng. 2118, 83 (1994).

S. Sato, K. Takahashi, I. Tanaka, O. Noda, S. Kuribayashi, S. Imatake, M. Kondo, Proc. Soc. Photo-Opt. Instrum. Eng. 1397, 421 (1990).

M. Schellhorn, H. von Bülow, Proc. Soc. Photo-Opt. Instrum. Eng. 2502, 664 (1994).

Other (2)

B. A. Mehmetli, K. Takahashi, S. Sato, “Comparison of aluminum alloys’ welding characteristics with 1 kW CO and CO2 lasers ,” J. Laser Applications (to be published).

F. Maisenhälder, in Proceedings of the International Conference on Laser Advanced Materials Processing (High Temperature Society of Japan, Osaka, 1992), p. 43.

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Figures (4)

Fig. 1
Fig. 1

Diagram of the apparatus.

Fig. 2
Fig. 2

Dependence of the laser output power on the rf input power for various total pressures.

Fig. 3
Fig. 3

Dependence of the laser power on the entrance gas temperature. The total pressure is 78 Torr, and the rf input power is 14.9 kW.

Fig. 4
Fig. 4

Temporal variation of the output. The entrance gas temperature is 290 K, the total pressure is 70 Torr, and the rf input power is 15.8 kW.

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