Abstract

We report on the study of direct amplification of femtosecond pulses in an 80μm core diameter microstructured Yb-doped rod-type fiber amplifier in the nonlinear regime. The system includes a compact single grating compressor for the compensation of the small dispersion in the amplifier. With a 1250linemm (l/mm) grating-based compressor, pulses as short as 49fs with 870nJ pulse energy and 12MW peak power are obtained. Alternatively, the use of a 1740lmm grating allows the production of higher quality pulses of 70fs, 1.25μJ pulse energy, and 16MW peak power.

© 2008 Optical Society of America

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M. E. Fermann, V. I. Kruglov, B. C. Thomsen, J. M. Dudley, and J. D. Harvey, Phys. Rev. Lett. 84, 6010 (2000).
[CrossRef] [PubMed]

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Figures (5)

Fig. 1
Fig. 1

Experimental setup.

Fig. 2
Fig. 2

Retrieved temporal intensity profile (SHG FROG) of the seed (dotted) and compressed pulses at 185 nJ (dashed) and 870 nJ (solid) output power (corresponding spectra in the inset) for the 1250 l mm grating case.

Fig. 3
Fig. 3

Pulse duration and corresponding peak power as a function of output energy for the 1250 l mm transmission grating.

Fig. 4
Fig. 4

Retrieved temporal intensity profile for the seed (dotted) and best quality recompressed pulse (dash dot), and the highest peak power pulse (solid) with corresponding spectra (top inset). SHG FROG for the highest peak power case (bottom inset).

Fig. 5
Fig. 5

Pulse duration and corresponding peak power as a function of output energy for the 1740 l mm transmission grating.

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