7 March 2014 Spatio-temporal characterization techniques of high-power femtosecond laser chains
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In this letter, we propose two techniques capable of spatio-temporally characterizing high-power femtosecond laser chains. We demonstrate a new implementation of SEA TADPOLE. To avoid the problems induced by the the significant spatial jittering of the focal spot on high-power laser chains, our setup is adapted to collimated beams. In addition, a fibered light source is also used to correct the phase fluctuations. This experimental setup allows identifying any spatiotemporal distortions such as the pulse front tilt for instance. In this paper, to the best of our knowledge, we present the very first spatio-temporal characterization done on a TW laser. However, a SEA TADPOLE measurement is not immediate since it requires scanning the beam over the two transverse dimensions which prevent us from studying the shot-to-shot laser fluctuations. This is why, we developed MUFFIN, a single-shot technique capable of spatio-temporally characterizing a laser pulse along its two transverse dimensions. First experimental results obtained with this technique are presented here.
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Valentin Gallet, Valentin Gallet, Gustave Pariente, Gustave Pariente, Subhendu Kahaly, Subhendu Kahaly, Olivier Gobert, Olivier Gobert, Fabien Quéré, Fabien Quéré, "Spatio-temporal characterization techniques of high-power femtosecond laser chains", Proc. SPIE 8972, Frontiers in Ultrafast Optics: Biomedical, Scientific, and Industrial Applications XIV, 89720S (7 March 2014); doi: 10.1117/12.2037688; https://doi.org/10.1117/12.2037688

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