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Huber, R.; Adler, F.; Leitenstorfer, A.; Beutter, M.; Baum, P. and Riedle, Eberhard ORCID logoORCID: https://orcid.org/0000-0002-2672-5718 (November 2003): 12-fs pulses from a continuous-wave-pumped 200-nJ Ti : sapphire amplifier at a variable repetition rate as high as 4 MHz. In: Optics Letters, Vol. 28, No. 21: pp. 2118-2120

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Abstract

We demonstrate a novel compact femtosecond Ti:sapphire laser system operating at repetition rates from 10 kHz to 4 MHz. The scheme is based on the combination of a broadband cavity-dumped oscillator and a double-pass Ti:sapphire amplifier pumped by a low-noise cw solid-state laser. Amplified pulses with an extremely smooth spectrum, a duration of only 12 fs, and less than 0.25% rms fluctuation are generated in a beam with M-2 < 1.2. A maximum pulse energy of 210 nJ and an average output power of as much as 720 mW are achieved. This output energy is sufficient to generate a stable continuum in a sapphire disk. (C) 2003 Optical Society of America.

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