Abstract

We report the generation of 26-fs-duration pulses, with an energy of 60 mJ, from a simple multipass Ti:sapphire amplifier system. The peak power of our amplified pulses is 2 TW, and the repetition rate is 10 Hz. Our amplifier design consists of two highly doped multipass amplifiers and is simple and compact. We use an all-reflective, low-groove-density grating stretcher and compressor, combined with a relatively short material path length in the amplifier. This design allows us to minimize higher-order dispersion. The result is a laser system that generates multiterrawatt transform-limited pulses, with good beam quality and low amplified-spontaneous-emission levels, at a duration near the theoretical limit imposed by gain narrowing in Ti:sapphire.

© 1995 Optical Society of America

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References

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1994 (3)

1993 (2)

1992 (2)

1991 (2)

1986 (1)

1985 (1)

D. Strickland, G. Mourou, Opt. Commun. 56, 219 (1985).
[Crossref]

Antonetti, A.

Asaki, M. T.

Barty, C. P. J.

Blair, R. J.

Chambaret, J. P.

Christov, I. P.

Ditmire, T.

Falcone, R. W.

Garvey, D.

Gordon, C. L.

Gordon, S.

Grillon, G.

Hamster, H.

Huang, C. P.

Hunter, J. R.

Kapteyn, H. C.

Kmetic, J. D.

Le Blanc, C.

Lemoff, B. E.

Macklin, J. J.

Migus, A.

Moulton, P.

P. Moulton, Proc. IEEE 80, 348 (1992).
[Crossref]

Moulton, P. F.

Mourou, G.

D. Strickland, G. Mourou, Opt. Commun. 56, 219 (1985).
[Crossref]

Murnane, M. M.

Nathel, H.

Perry, M. D.

Shi, C.

Strickland, D.

D. Strickland, G. Mourou, Opt. Commun. 56, 219 (1985).
[Crossref]

Sullivan, A.

Taft, G.

White, W.

White, W. E.

W. E. White, J. R. Hunter, L. V. Woerkom, T. Ditmire, M. D. Perry, Opt. Lett. 17, 1067 (1992).
[Crossref] [PubMed]

W. E. White, Lawrence Livermore National Laboratory, Livermore, Calif. 94550 (personal communication, 1994).

Woerkom, L. V.

Young, J. F.

Zhou, J.

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Figures (4)

Fig. 1
Fig. 1

Diagram of the laser system that generates 2-TW, 26-fs pulses.

Fig. 2
Fig. 2

Spectrum of the output pulses at full energy: solid curve, after the second amplifier, the spectrum is 39 nm FWHM with a pulse energy of 120 mJ; dotted curve, after passing through the compressor, the spectrum narrows to 32 nm, and the pulse energy is reduced to 60 mJ.

Fig. 3
Fig. 3

Single-shot autocorrelation trace of the pulse output at full energy. Crosses, experimental data; solid curve, fit to the data, corresponding to a 26-fs pulse with a sech2 pulse shape.

Fig. 4
Fig. 4

Focal spot resulting from focusing a small fraction of the pulse power with a 1-m radius-of-curvature mirror. The spot size of 40 μm FWHM is approximately diffraction limited, assuming an 11-mm-diameter flat-topped beam.

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