Diode-pumped chirped pulse amplification to the joule level

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 Yb-doped fluoride phosphate glass at 940 nm. Recently, stable operation of the first three amplifiers was achieved. Puls...

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Veröffentlicht in:	Applied physics. B, Lasers and optics Lasers and optics, 2004-09, Vol.79 (4), p.419-422
Hauptverfasser:	HEIN, J, PODLESKA, S, SIEBOLD, M, HELLWING, M, BÖDEFELD, R, SAUERBREY, R, EHRT, D, WINTZER, W
Format:	Artikel
Sprache:	eng
Schlagworte:	Adjustable Amplifiers Collimation Design of specific laser systems Diode-pumped lasers Exact sciences and technology Femtosecond Fundamental areas of phenomenology (including applications) Laser materials Laser optical systems: design and operation Lasers Maintenance Optical materials Optical pumping Optics Phosphate glass Physics
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Beschreibung
Zusammenfassung:	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 Yb-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.
ISSN:	0946-2171 1432-0649
DOI:	10.1007/s00340-004-1586-3