Abstract

We demonstrate what is to our knowledge the first frequency-resolved optical gating (FROG) technique to measure ultrashort pulses from an unamplified Ti:sapphire laser oscillator without direction-of-time ambiguity. This technique utilizes surface third-harmonic generation as the nonlinear-optical effect and, surprisingly, is the most sensitive third-order FROG geometry yet.

© 1996 Optical Society of America

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References

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1995 (3)

1994 (3)

1993 (1)

1991 (1)

Chilla, J. L. A.

Christov, I. P.

Chu, K. C.

DeLong, K. W.

Dienes, A.

Fittinghoff, D. N.

Grant, R. S.

Heritage, J. P.

Hunter, J.

Kane, D. J.

Kapteyn, H. C.

Kohler, B.

Liu, K. X.

Luther-Davies, B.

B. Luther-Davies, M. Samoc, J. Swiatkiewicz, A. Samoc, M. Woodruff, R. Trebino, K. W. DeLong, “Diagnostics of femtosecond laser pulses using films of poly (p-phenylenevinylene),” submitted toOpt. Commun.

Martinez, O. E.

Murnane, M. M.

Rundquist, A.

Samoc, A.

B. Luther-Davies, M. Samoc, J. Swiatkiewicz, A. Samoc, M. Woodruff, R. Trebino, K. W. DeLong, “Diagnostics of femtosecond laser pulses using films of poly (p-phenylenevinylene),” submitted toOpt. Commun.

Samoc, M.

B. Luther-Davies, M. Samoc, J. Swiatkiewicz, A. Samoc, M. Woodruff, R. Trebino, K. W. DeLong, “Diagnostics of femtosecond laser pulses using films of poly (p-phenylenevinylene),” submitted toOpt. Commun.

Swiatkiewicz, J.

B. Luther-Davies, M. Samoc, J. Swiatkiewicz, A. Samoc, M. Woodruff, R. Trebino, K. W. DeLong, “Diagnostics of femtosecond laser pulses using films of poly (p-phenylenevinylene),” submitted toOpt. Commun.

Taft, G.

Trebino, R.

Tsang, T.

T. Tsang, Phys. Rev. A 52, 4116 (1995).
[CrossRef] [PubMed]

White, W. E.

Wilson, K.

Woodruff, M.

B. Luther-Davies, M. Samoc, J. Swiatkiewicz, A. Samoc, M. Woodruff, R. Trebino, K. W. DeLong, “Diagnostics of femtosecond laser pulses using films of poly (p-phenylenevinylene),” submitted toOpt. Commun.

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Figures (7)

Fig. 1
Fig. 1

Experimental setup for surface THG FROG measurements.

Fig. 2
Fig. 2

Examples of simulated THG FROG traces for pulses with Gaussian intensity profiles and different phase distortions: (a) spectral quartic phase, (b) spectral cubic phase, (c) temporal cubic phase, (d) self-phase modulation.

Fig. 3
Fig. 3

Retrieved intensity and phase for a nearly transform-limited oscillator pulse. The insets show the corresponding experimental SHG FROG and THG FROG traces, both approximately symmetrical in time.

Fig. 4
Fig. 4

Measured and reconstructed SHG FROG traces and THG FROG traces for a clearly non-transform-limited pulse.

Fig. 5
Fig. 5

Retrieved intensity and phase in the time domain for the pulse corresponding to Fig. 4. The inset shows the independently measured spectrum in comparison with the retrieved intensity and phase in the frequency domain.

Fig. 6
Fig. 6

Measured and reconstructed SHG FROG traces and THG FROG traces for a strongly distorted pulse.

Fig. 7
Fig. 7

Retrieved intensity and phase for the pulse corresponding to Fig. 6. The inset shows the independently measured spectrum and the retrieved intensity and phase in the frequency domain.

Equations (2)

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E sig THG ( t , τ ) = E 2 ( t ) E ( t τ ) .
E sig THG ( t , τ ) = E ( t ) E ( t τ ) ,

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