Abstract

We report extensive measurements of gain in the Xe III system initially observed by Kapteyn et al. [Phys. Rev. Lett. 57, 2939 (1986)]. The dependence of this gain on pressure, pumping-pulse length, and pump energy is presented. By optimizing these parameters we have achieved a gain of exp(3.2) by using only 0.56 J of 1064-nm energy on target, representing an efficiency improvement of nearly 100. Total gains as high as exp(6.6) have been measured when using higher energies. Our data indicate that effective laser-produced plasmas can be created with applied power densities as low as 5 × 1010 W cms−2.

© 1987 Optical Society of America

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References

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  1. H. C. Kapteyn, R. W. Lee, R. W. Falcone, Phys. Rev. Lett. 57, 2939 (1986).
    [CrossRef] [PubMed]
  2. H. C. Kapteyn, M. M. Murnane, R. W. Falcone, Proc. Soc. Photo-Opt. Instrum. Eng.688 (to be published).
  3. G. J. Linford, E. R. Peressini, W. R. Sooy, M. L. Spaeth, Appl. Opt. 13, 379 (1974).
    [CrossRef] [PubMed]
  4. A. J. Mendelsohn, S. E. Harris, Opt. Lett. 10, 128 (1985).
    [CrossRef] [PubMed]
  5. D. J. Walker, R. G. Caro, S. E. Harris, J. Opt. Soc. Am. B 3, 1515 (1986).
    [CrossRef]

1986 (2)

H. C. Kapteyn, R. W. Lee, R. W. Falcone, Phys. Rev. Lett. 57, 2939 (1986).
[CrossRef] [PubMed]

D. J. Walker, R. G. Caro, S. E. Harris, J. Opt. Soc. Am. B 3, 1515 (1986).
[CrossRef]

1985 (1)

1974 (1)

Caro, R. G.

Falcone, R. W.

H. C. Kapteyn, R. W. Lee, R. W. Falcone, Phys. Rev. Lett. 57, 2939 (1986).
[CrossRef] [PubMed]

H. C. Kapteyn, M. M. Murnane, R. W. Falcone, Proc. Soc. Photo-Opt. Instrum. Eng.688 (to be published).

Harris, S. E.

Kapteyn, H. C.

H. C. Kapteyn, R. W. Lee, R. W. Falcone, Phys. Rev. Lett. 57, 2939 (1986).
[CrossRef] [PubMed]

H. C. Kapteyn, M. M. Murnane, R. W. Falcone, Proc. Soc. Photo-Opt. Instrum. Eng.688 (to be published).

Lee, R. W.

H. C. Kapteyn, R. W. Lee, R. W. Falcone, Phys. Rev. Lett. 57, 2939 (1986).
[CrossRef] [PubMed]

Linford, G. J.

Mendelsohn, A. J.

Murnane, M. M.

H. C. Kapteyn, M. M. Murnane, R. W. Falcone, Proc. Soc. Photo-Opt. Instrum. Eng.688 (to be published).

Peressini, E. R.

Sooy, W. R.

Spaeth, M. L.

Walker, D. J.

Appl. Opt. (1)

J. Opt. Soc. Am. B (1)

Opt. Lett. (1)

Phys. Rev. Lett. (1)

H. C. Kapteyn, R. W. Lee, R. W. Falcone, Phys. Rev. Lett. 57, 2939 (1986).
[CrossRef] [PubMed]

Other (1)

H. C. Kapteyn, M. M. Murnane, R. W. Falcone, Proc. Soc. Photo-Opt. Instrum. Eng.688 (to be published).

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Figures (6)

Fig. 1
Fig. 1

Simplified energy-level diagram of Xe.

Fig. 2
Fig. 2

Schematic of the experimental configuration. Not shown are the aperture limiting the field of view of the spectrometer to the volume inside the channel and the shields used to vary the active length.

Fig. 3
Fig. 3

Output energy at 108.9 nm as a function of pumped length for a plasma-producing laser energy of 10 J in a 600 psec pulse length at 2.5-Torr Xe pressure. The points are measured values; the curve is a plot of relation (1) with α = 2.36.

Fig. 4
Fig. 4

Gain coefficient as a function of pressure for excitation pulse lengths of 200 and 600 psec; the laser power density on target is about 1.4 × 1011 W cm−2 in both cases.

Fig. 5
Fig. 5

Gain coefficient as a function of 1064-nm laser energy on target; the pulse length was 600 psec and the pressure was 2.5 Torr.

Fig. 6
Fig. 6

Gain as a function of pulse length for a constant energy of 2.5 J and 4-Torr Xe pressure.

Equations (1)

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E [ exp ( α l ) 1 ] 3 / 2 [ α l exp ( α l ) ] 1 / 2 ,

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