Abstract

We demonstrate a Kerr-lens mode-locked Ti:sapphire oscillator that generates 130-nJ, 26-fs and 220-nJ, 30-fs pulses at a repetition rate of 11 MHz. The generation of stable broadband, high-energy pulses from an extended-cavity oscillator is achieved by the use of chirped multilayer mirrors to produce a small net positive dispersion over a broad spectral range. The resultant chirped picosecond pulses are compressed by a dispersive delay line that is external to the laser cavity. The demonstrated peak powers, in excess of 5 MW, are to our knowledge the highest ever achieved from a cw-pumped laser and are expected to be scalable to tens of megawatts by an increase in the pump power and (or) a decrease in the repetition rate. The demonstrated source permits micromachining of any materials under relaxed focusing conditions.

© 2004 Optical Society of America

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[CrossRef]

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G. Cheng, Y. Wang, J. D. White, Q. Liu, W. Zhao, and G. Chen, J. Appl. Phys. 94, 1304 (2003).
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G. Cheng, Y. Wang, J. D. White, Q. Liu, W. Zhao, and G. Chen, J. Appl. Phys. 94, 1304 (2003).
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Dewald, S.

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F. Krausz, M. E. Fermann, T. Brabec, P. F. Curley, M. Hofer, M. H. Ober, Ch. Spielmann, E. Wintner, and A. J. Schmidt, IEEE J. Quantum Electron. 28, 2097 (1992).
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Ippen, E. P.

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Jiang, Y.

Kalashnikov, V. L.

V. L. Kalashnikov, E. Sorokin, and I. T. Sorokina, IEEE J. Quantum Electron. 39, 323 (2003).
[CrossRef]

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Kapteyn, H. C.

Kärtner, F. X.

Ketwaroo, G.

Knox, W. H.

Kowalevicz, Jr., A. M.

Krausz, F.

J. Seres, A. Müller, E. Seres, K. O'Keeffe, M. Lenner, R. F. Herzog, D. Kaplan, Ch. Spielmann, and F. Krausz, Opt. Lett. 28, 1832 (2003).
[CrossRef] [PubMed]

Ch. Spielmann, P. F. Curley, T. Brabec, and F. Krausz, IEEE J. Quantum Electron. 30, 1100 (1994).
[CrossRef]

F. Krausz, M. E. Fermann, T. Brabec, P. F. Curley, M. Hofer, M. H. Ober, Ch. Spielmann, E. Wintner, and A. J. Schmidt, IEEE J. Quantum Electron. 28, 2097 (1992).
[CrossRef]

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Leitenstorfer, A.

Lenner, M.

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G. Cheng, Y. Wang, J. D. White, Q. Liu, W. Zhao, and G. Chen, J. Appl. Phys. 94, 1304 (2003).
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Mével, E.

Morgner, U.

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[CrossRef]

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[CrossRef]

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V. L. Kalashnikov, E. Sorokin, and I. T. Sorokina, IEEE J. Quantum Electron. 39, 323 (2003).
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V. L. Kalashnikov, E. Sorokin, and I. T. Sorokina, IEEE J. Quantum Electron. 39, 323 (2003).
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J. Seres, A. Müller, E. Seres, K. O'Keeffe, M. Lenner, R. F. Herzog, D. Kaplan, Ch. Spielmann, and F. Krausz, Opt. Lett. 28, 1832 (2003).
[CrossRef] [PubMed]

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[CrossRef]

F. Krausz, M. E. Fermann, T. Brabec, P. F. Curley, M. Hofer, M. H. Ober, Ch. Spielmann, E. Wintner, and A. J. Schmidt, IEEE J. Quantum Electron. 28, 2097 (1992).
[CrossRef]

Taylor, R. S.

Tcherbakoff, O.

Thompson, S.

van Driel, M.

Wang, Y.

G. Cheng, Y. Wang, J. D. White, Q. Liu, W. Zhao, and G. Chen, J. Appl. Phys. 94, 1304 (2003).
[CrossRef]

Westwig, E.

White, J. D.

G. Cheng, Y. Wang, J. D. White, Q. Liu, W. Zhao, and G. Chen, J. Appl. Phys. 94, 1304 (2003).
[CrossRef]

Wintner, E.

F. Krausz, M. E. Fermann, T. Brabec, P. F. Curley, M. Hofer, M. H. Ober, Ch. Spielmann, E. Wintner, and A. J. Schmidt, IEEE J. Quantum Electron. 28, 2097 (1992).
[CrossRef]

Wise, F.

Zare, A. T.

Zhao, W.

G. Cheng, Y. Wang, J. D. White, Q. Liu, W. Zhao, and G. Chen, J. Appl. Phys. 94, 1304 (2003).
[CrossRef]

Appl. Opt.

IEEE J. Quantum Electron.

Ch. Spielmann, P. F. Curley, T. Brabec, and F. Krausz, IEEE J. Quantum Electron. 30, 1100 (1994).
[CrossRef]

F. Krausz, M. E. Fermann, T. Brabec, P. F. Curley, M. Hofer, M. H. Ober, Ch. Spielmann, E. Wintner, and A. J. Schmidt, IEEE J. Quantum Electron. 28, 2097 (1992).
[CrossRef]

V. L. Kalashnikov, E. Sorokin, and I. T. Sorokina, IEEE J. Quantum Electron. 39, 323 (2003).
[CrossRef]

J. Appl. Phys.

G. Cheng, Y. Wang, J. D. White, Q. Liu, W. Zhao, and G. Chen, J. Appl. Phys. 94, 1304 (2003).
[CrossRef]

J. Opt. Soc. Am. B

Opt. Lett.

Other

H. S. Carslaw and J. C. Jaeger, Conduction of Heat in Solids (Oxford U. Press, London, 1959), p. 256.

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Figures (3)

Fig. 1
Fig. 1

Schematic of the oscillator. The distance between 2-in. telescope mirrors is 75 cm. Ti:sapphire crystal length, 2.9 mm; pump absorption, 67%; maximum output average power behind the compressor, 1.9 W at 10.2 W of pump power. r, radius of curvature; L, lens; X, Ti:sapphire crystal; OC, output coupler.

Fig. 2
Fig. 2

Pulse train in different operational modes of the oscillator: (a) positive dispersion regime with picosecond pulses; (b) period doubling mode (also in the positive dispersion regime).

Fig. 3
Fig. 3

SPIDER measurement results for the compressed 130-nJ pulses (7 W of pump power). (a) retrieved spectral phase and intensity spectrum of the pulses. (b) Temporal profile of the pulses obtained with the inverse Fourier transform of (a). The measured interferometric autocorrelation trace is shown in the inset of (b).

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