Diode-pumped chirped pulse amplification to the joule level |
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Authors: | J?Hein Email author" target="_blank">S?PodleskaEmail author M?Siebold M?Hellwing R?B?defeld R?Sauerbrey D?Ehrt W?Wintzer |
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Institution: | (1) Institute for Optics and Quantum Electronics, FSU Jena, Max-Wien-Platz 1, 07743 Jena, Germany;(2) Otto-Schott-Institute, FSU Jena, Fraunhoferstrasse 6, 07743 Jena, Germany |
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Abstract: | The POLARIS project aims at the development of an all-diode-pumped, high-peak-power femtosecond laser system reaching the petawatt level. The laser amplifiers are based on pumping Yb3+-doped fluoride phosphate glass at 940 nm. Recently, stable operation of the first three amplifiers was achieved. Pulses with a bandwidth of 12 nm, which supports 135 fs pulses with energies up to 1.25 J, were generated in the third amplifier with a 12-pass configuration. The amplifier was pumped by 150 collimated high-power laser diodes. Successive polarization maintenance is used for a compact, stable, and convenient adjustable setup. Thermally induced abberations of lowest order were compensated by adaptive mirrors. PACS 42.55.Xi; 42.60.By; 42.70.Hj |
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