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Journal Articles Applied Physics B - Laser and Optics Year : 2004

Characterization of collisionally pumped optical-field-ionization soft X-ray lasers

Abstract

We give an overview of recent experimental results on optical-field-ionization collisional soft X-ray lasers developed at LOA. By focusing a 30-fs, circularly polarized Ti-sapphire laser pulse at an intensity of up to 8×10^17 Wcm^-2 into a low-density gas cell containing Xe or Kr, we produced a few mm long plasma column for soft X-ray amplifier. Saturated amplification has been achieved on the 4d^95d(1S0)–4^95p(1P1) transition at 41.8 nm in Xe8+, and on the 3d^94d(1S0)–3d^94p(1P1) transition in Kr8+ at 32.8 nm. Under optimum pumping conditions the Xe8+ laser provides about (5±2)×10^9 photons per pulse whilst the Kr8+ laser delivers up to (2.5±1)×10^9 photons per shot. The repetition rate of these soft X-ray lasers is 10 Hz. The beam wavefront of the Xe8+ laser has been measured by a Shack–Hartmann soft X-ray wavefront sensor, and the pulse duration by a cross-correlation technique.

Dates and versions

hal-00522717 , version 1 (01-10-2010)

Identifiers

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Tomas Mocek, Stéphane Sebban, Islam Bettaibi, L. M. Upcraft, Philippe Balcou, et al.. Characterization of collisionally pumped optical-field-ionization soft X-ray lasers. Applied Physics B - Laser and Optics, 2004, 78 (7-8), pp.939-944. ⟨10.1007/s00340-004-1436-3⟩. ⟨hal-00522717⟩
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