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5 March 2021 Kilowatt-average-power compression of millijoule pulses in a gas-filled multi-pass cell
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We demonstrate the 6.5-fold compression of 1-mJ 200-fs pulses by spectral broadening in a gas-filled multi-pass cell and subsequent chirped-mirror compression. A coherently-combined fiber laser source is compressed with an overall power efficiency of ~95% resulting in a record compressed power of >950 W. In a second experiment, the same overall spectral broadening is obtained with the nonlinear phase per medium pass enhanced to well beyond 3 rad while still retaining all the favorable properties of the multi-pass cell configuration. This may enable an even higher power efficiency beyond 95%.
Conference Presentation
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Christian Grebing, Michael Müller, Joachim Buldt, Henning Stark, and Jens Limpert "Kilowatt-average-power compression of millijoule pulses in a gas-filled multi-pass cell", Proc. SPIE 11664, Solid State Lasers XXX: Technology and Devices, 116640Q (5 March 2021);

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