Abstract

Using a Gaussian-to-flattop beam reshaper and a frequency-doubling crystal, we demonstrate highly efficient and spatially uniform pulse compression of 1mJ, 100fs pulses from a regenerative Ti:sapphire amplifier. The technique has general applicability to all-bulk self-defocusing-type cascaded-quadratic compressors, providing a way to increase peak power and intensity for a wide range of amplified femtosecond pulsed lasers.

© 2007 Optical Society of America

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References

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2006 (2)

2004 (1)

S. Ashihara, T. Shimura, K. Kuroda, N. E. Yu, S. Kurimura, K. Kitamura, M. Cha, and T. Taira, Appl. Phys. Lett. 84, 1055 (2004).
[CrossRef]

2003 (1)

2002 (1)

2001 (1)

2000 (1)

1999 (1)

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E. M. Dianov, Z. S. Nikonova, A. M. Prokhorov, and V. N. Serkin, Sov. Tech. Phys. Lett. 12, 311 (1986).

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Figures (4)

Fig. 1
Fig. 1

Optimal compressor length and local intensity versus radial position for a Gaussian beam, based on empirical laws for soliton compression for an arbitrary compression ratio of 2 at beam center.

Fig. 2
Fig. 2

Gaussian beam experiment: beam profile (a) and compression results (b). Compression data are beam samples along a vertically centered horizontal stripe.

Fig. 3
Fig. 3

Flattop beam experiment: beam profile (a) and compression results (b)–(d). Compression data are beam samples along a horizontal stripe above vertical center (b), short-dashed line in (a); at center (c), long-dashed line; and below center (d), dotted–dashed line.

Fig. 4
Fig. 4

Intensity autocorrelations: at Gaussian beam center (a), a pulse representative of the flattop beam (b), and at Gaussian beam center with 10 mm of fused silica prior to the compressor (c).

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