Chirped-pulse oscillators for the generation of high-energy femtosecond laser pulses

Alexander Fuerbach*, A. Fernandez, A. Apolonski, T. Fuji, F. Krausz

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

26 Citations (Scopus)
4 Downloads (Pure)


This paper reports on a novel approach for producing high energy femtosecond pulses without external amplification. The so-called chirped-pulse oscillator (CPO) concept is based on an extended-cavity oscillator, operating at small net positive intracavity group delay dispersion (GDD), over a broad spectral range by the use of chirped multilayer mirrors. The resultant chirped picosecond pulses are compressed by a dispersive delay line external to the laser cavity. Utilizing this technique, sub-30 fs pulses with an energy exceeding 200 nJ at a repetition rate of 11 MHz were produced. The demonstrated peak power in excess of 5 MW is the highest ever achieved from a cw-pumped laser and is expected to be scaleable to tens of megawatts by increasing the pump power and/or decreasing the repetition rate. The demonstrated source allows micromachining of any materials under relaxed focusing conditions.

Original languageEnglish
Pages (from-to)113-116
Number of pages4
JournalLaser and Particle Beams
Issue number2
Publication statusPublished - Jun 2005
Externally publishedYes

Bibliographical note

Copyright 2005 Cambridge University Press. Article originally published in Laser and Particle Beams, Vol. 23, Issue 2, pp. 113-116. The original article can be found at


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