Abstract

We implement both chirped pulse amplification and divided pulse amplification in the same femtosecond fiber amplifier setup. This scheme allows an equivalent stretched pulse duration of 2.4 ns in a compact tabletop system. The generation of 77 W of compressed average power at 4.8 MHz, together with 320 fs and 430 μJ pulses at a repetition rate of 96 kHz, is demonstrated using a distributed mode-filtering, rod-type, ytterbium-doped fiber. Limitations in the temporal recombining efficiency due to gain saturation inside the fiber amplifier are identified.

© 2013 Optical Society of America

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References

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2012 (4)

2008 (1)

2007 (1)

1985 (1)

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

Alkeskjold, T. T.

Baltuska, A.

Boullet, J.

Broeng, J.

Cormier, E.

Daniault, L.

Druon, F.

Georges, P.

Hanna, M.

Hansen, K. R.

Jørgensen, M. M.

Kong, L. J.

Lægsgaard, J.

Laurila, M.

Lefrancois, S.

Mottay, E.

Mourou, G.

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

Mücke, O. D.

Ouzounov, D. G.

Papadopoulos, D. N.

Pugzlys, A.

Reider, G. A.

Roither, S.

Strickland, D.

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

Verhoef, A. J.

Wise, F. W.

Yang, C. X.

Zaouter, Y.

Zhao, L. M.

Zhou, S.

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Figures (5)

Fig. 1.
Fig. 1.

Experimental setup.

Fig. 2.
Fig. 2.

Combined, uncombined, and compressed average power and temporal combining efficiency as a function of pump power for 96 kHz (bottom) and 4.8 MHz (top) repetition rates, and 2 (left) and 4 (right) replicas.

Fig. 3.
Fig. 3.

Autocorrelation traces measured at 175 μJ total output energy for one, two, and four pulse replicas.

Fig. 4.
Fig. 4.

Oscilloscope temporal traces of the train of four replicas at the input (blue curve) and output (red curve) of the amplifier. Left: equal energy seeding. Right: optimal energy seeding at the highest pulse energy of 430 μJ.

Fig. 5.
Fig. 5.

Autocorrelation trace (left) and spectrum (right) measured at 430 μJ.

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