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Optics Letters

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  • Vol. 29, Iss. 12 — Jun. 15, 2004
  • pp: 1366–1368

Chirped-pulse oscillators: a route to high-power femtosecond pulses without external amplification

A. Fernandez, T. Fuji, A. Poppe, A. Fürbach, F. Krausz, and A. Apolonski  »View Author Affiliations


Optics Letters, Vol. 29, Issue 12, pp. 1366-1368 (2004)
http://dx.doi.org/10.1364/OL.29.001366


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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

OCIS Codes
(140.7090) Lasers and laser optics : Ultrafast lasers
(320.5520) Ultrafast optics : Pulse compression
(320.7100) Ultrafast optics : Ultrafast measurements

Citation
A. Fernandez, T. Fuji, A. Poppe, A. Fürbach, F. Krausz, and A. Apolonski, "Chirped-pulse oscillators: a route to high-power femtosecond pulses without external amplification," Opt. Lett. 29, 1366-1368 (2004)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-29-12-1366


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