Abstract

A noncollinearly phase-matched optical parametric amplifier pumped by a commercial 2MHz fiber laser is presented and discussed. The pump system allows the direct generation of a seed continuum from a sapphire plate. Clean pulses with up to 860nJ energy and down to 14fs pulse length can be obtained over a fundamental tuning range from 620 to 970nm. Conversion by second- and third-harmonic generation as well as sum frequency mixing results in an extended tuning range down to well below 300nm.

© 2008 Optical Society of America

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References

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2007 (1)

2006 (4)

2005 (1)

2004 (1)

I. Z. Kozma, P. Baum, U. Schmidhammer, S. Lochbrunner, and E. Riedle, Rev. Sci. Instrum. 75, 2323 (2004).
[CrossRef]

2003 (2)

2002 (1)

P. Tzankov, I. Buchvarov, and T. Fiebig, Opt. Commun. 203, 107 (2002).
[CrossRef]

2000 (1)

E. Riedle, M. Beutter, S. Lochbrunner, J. Piel, S. Schenkl, S. Spörlein, and W. Zinth, Appl. Phys. B 71, 457 (2000).

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Figures (4)

Fig. 1
Fig. 1

(a) 2 MHz NOPA. (b) SFM of the doubled NOPA output with the fundamental of the pump. (c) THG of the NOPA. DM, dichroic mirror; L, lens; M, mirror.

Fig. 2
Fig. 2

(a) Spectrum of the seed continuum. (b) NOPA spectra with bandwidth reduced by 10 mm SF57 chirper. (c) NOPA spectra with full bandwidth [spectra of (d) and (e): solid curves]. (d), (e) Autocorrelation (with Gauss fit) at 719 and 865 nm , respectively. The vertical scale is linear in all panels.

Fig. 3
Fig. 3

Fourier limits and energies of the NOPA, SHG, SFM, and THG pulses with and without additional chirpers in the seed at 500 kHz ( ) and 2 MHz ( ) . Solid lines are guides to the eye.

Fig. 4
Fig. 4

Spectra of the NOPA (first column), SHG (second column), SFM (top right graph), and THG (bottom right graph) pulses.

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