Abstract

We present experimental results of the amplification of strongly amplitude-modulated chirped pulses resulting from the coherent addition of two delayed short pulses. The nonlinearities in the amplifier chain induce a temporal diffraction resulting in prepulses and postpulses, in addition to the two main pulses when compressed. Simultaneously, temporal-resolved and spectral-resolved output pulses show that the prepulses and postpulses are blue shifted and red shifted, respectively, explaining the causality of the system.

© 1995 Optical Society of America

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References

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1994

D. Umstadter, E. Esarey, J. Kim, Phys. Rev. Lett. 72, 1224, (1994).
[CrossRef] [PubMed]

B. Kolner, IEEE J. Quantum Electron. 30, 1951 (1994).
[CrossRef]

1993

1992

1988

1985

Boyer, G. R.

da Silva, V. L.

Esarey, E.

D. Umstadter, E. Esarey, J. Kim, Phys. Rev. Lett. 72, 1224, (1994).
[CrossRef] [PubMed]

Franco, M. A.

Heritage, J. P.

Jackson, M. K.

Kim, J.

D. Umstadter, E. Esarey, J. Kim, Phys. Rev. Lett. 72, 1224, (1994).
[CrossRef] [PubMed]

Kirchner, E. M.

Kolner, B.

B. Kolner, IEEE J. Quantum Electron. 30, 1951 (1994).
[CrossRef]

Migus, A.

J. Paye, A. Migus, “Space–time Wigner functions and their application to the analysis of a pulse shaper,” submitted toJ. Opt. Soc. Am. B.

Mysyrowicz, A.

Paye, J.

M. K. Jackson, G. R. Boyer, J. Paye, M. A. Franco, A. Mysyrowicz, Opt. Lett. 17, 1770 (1992).
[CrossRef] [PubMed]

J. Paye, A. Migus, “Space–time Wigner functions and their application to the analysis of a pulse shaper,” submitted toJ. Opt. Soc. Am. B.

Silberberg, Y.

Thurston, R. N.

Umstadter, D.

D. Umstadter, E. Esarey, J. Kim, Phys. Rev. Lett. 72, 1224, (1994).
[CrossRef] [PubMed]

Weiner, A. M.

IEEE J. Quantum Electron.

B. Kolner, IEEE J. Quantum Electron. 30, 1951 (1994).
[CrossRef]

J. Opt. Soc. Am. B

Opt. Lett.

Phys. Rev. Lett.

D. Umstadter, E. Esarey, J. Kim, Phys. Rev. Lett. 72, 1224, (1994).
[CrossRef] [PubMed]

Other

J. Paye, A. Migus, “Space–time Wigner functions and their application to the analysis of a pulse shaper,” submitted toJ. Opt. Soc. Am. B.

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Figures (5)

Fig. 1
Fig. 1

Experimental arrangement of nonlinear pulse shaping in a chirped-pulse-amplification amplifier.

Fig. 2
Fig. 2

Spectrally and temporally resolved images of output pulses. The broad pulse widths are due to scattering from a diffuse surface. (a) Pulse separation is 1 ns and the stretched pulses do not overlap in the amplifiers. (b) Pulse separation is 400 ps and the stretched pulses partially overlap in the amplifiers.

Fig. 3
Fig. 3

Temporal beat pattern of the two chirped pulses with a delay td = 400 ps. Blue-shifted and red-shifted frequencies are generated on the rising and falling sides of the sinusoidal curve.

Fig. 4
Fig. 4

Simulation example with B = 0.3. (a) Input short pulse, (b) input spectrum, reproducing the experimental spectrum, (c) stretched pulses with delay td = 400 ps, (d) recompressed pulses after propagating in a nonlinear medium.

Fig. 5
Fig. 5

Spectra of individual recompressed pulses showing the spectral shifts. Note that the spectra of the two original pulses show asymmetric depletion because of the partial overlap of the stretched pulses in the nonlinear medium.

Equations (3)

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P NL = χ ( 3 ) [ E 1 ( ω 1 ) + E 2 ( ω 2 ) ] [ E 1 * ( - ω 1 ) + E 2 * ( - ω 2 ) ] × [ ( E 1 ( ω 1 ) + E 1 ( ω 1 ) ] ,
A ( z , τ ) z = γ 2 A ( z , τ ) - i β 2 A ( z , τ ) τ + i k 0 n 2 2 A ( z , τ ) 2 A ( z , τ ) ,
B = 2 π n 2 λ 0 L I ( z , τ ) d z = 2 π n 2 λ I in e γ L γ = 2 π n 2 λ I out γ ,

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