Abstract

We demonstrate for the first time to our knowledge the use of mismatched grating pairs between the stretching and compression systems in a chirped-pulse amplification laser. Pulses as short as 57 fs are generated with 2000-lines/mm gratings in the compressor and 1200-lines/mm gratings in the stretcher.

© 1998 Optical Society of America

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References

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1969

E. B. Treacy, “Optical pulse compression with diffraction gratings,” IEEE J. Quantum Electron. QE-5, 454–458 (1969).
[CrossRef]

Antonetti, A.

Boyd, R. D.

Britten, J. A.

Chambaret, J. P.

Cheriaux, G.

Cotton, C.

Curley, P. F.

Darpentigny, G.

Decker, D.

Du, D.

Kane, S.

Korn, G.

Le Blanc, C.

Mourou, G.

Pang, Y.

Perry, M. D.

Salin, F.

Shannon, C.

Shore, B. W.

Shults, E.

Squier, J.

Treacy, E. B.

E. B. Treacy, “Optical pulse compression with diffraction gratings,” IEEE J. Quantum Electron. QE-5, 454–458 (1969).
[CrossRef]

Vaillancourt, G.

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Figures (5)

Fig. 1
Fig. 1

Pulse spectrum after being stretched and amplified. The clipping visible on the spectrum occurs in the stretcher. The FWHM measures 24 nm.

Fig. 2
Fig. 2

Measured (dotted curve) and calculated (solid curve) second-order, noncollinear intensity autocorrelation. The pulse width deconvolves to 57 fs at FWHM.

Fig. 3
Fig. 3

Measured third-order correlation. The solid curve is a best fit to the intensity profile at FWHM. The asymmetry in the intensity profile is due predominately to residual third-order group-delay dispersion.

Fig. 4
Fig. 4

Calculated phase profile for a 55-fs Gaussian pulse. The lowest curve corresponds to the fourth-order phase-limited solution. Successive curves show the phase as the grating compressor is changed in length, the middle phase profile producing the shortest pulse width.

Fig. 5
Fig. 5

(a) Intensity profile of the pulse corresponding to the fourth-order limited phase. (b) The shortest pulse duration, which has a combination of group-delay dispersion, third-order dispersion, and fourth-order dispersion. (c) Dialing the compressor out further no longer shortens the pulse but broadens the pulse width and visibly distorts the intensity profile.

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