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arXiv · 1308.2117

Carrier-envelope phase stability of hollow-fibers used for high-energy, few-cycle pulse generation

William A. Okell·Tobias Witting·Davide Fabris·Dane Austin·Maïmouna Bocoum·Felix Frank·Aurelien Ricci·Aurelie Jullien·Daniel Walke·Jonathan P. Marangos·Rodrigo Lopez-Martens·John W. G. Tisch
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Abstract

We investigated the carrier-envelope phase (CEP) stability of a hollow-fiber setup used for high-energy, few-cycle pulse generation. Saturation of the output pulse energy is observed at 0.6 mJ for a 260 um inner-diameter, 1 m long fiber, statically filled with neon, with the pressure adjusted to achieve an output spectrum capable of supporting sub-4fs pulses. The maximum output pulse energy can be increased to 0.8mJ by using either differential pumping, or circularly polarized input pulses. We observe the onset of an ionization-induced CEP instability, which does not increase beyond an input pulse energy of 1.25 mJ due to losses in the fiber caused by ionization. There is no significant difference in the CEP stability with differential pumping compared to static-fill, demonstrating that gas flow in differentially pumped fibers does not degrade the CEP stabilization.

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William A. Okell, Tobias Witting, Davide Fabris, Dane Austin, Maïmouna Bocoum, Felix Frank, Aurelien Ricci, Aurelie Jullien, Daniel Walke, Jonathan P. Marangos, Rodrigo Lopez-Martens, John W. G. Tisch. 2013-08-09. Carrier-envelope phase stability of hollow-fibers used for high-energy, few-cycle pulse generation. https://doi.org/10.1364/ol.38.003918

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