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A compact multi-loop stretcher system with a pulse confining structure was demonstrated. This system generated chirped pulse with 32 ps/nm chirp rate. The energy loss in the stretcher was compensated by the OPCPA.
A Ti:Sa laser using a combination of negatively- and positively-chirped pulse amplification (NPCPA) is demonstrated. The method suppresses spectral narrowing typically appearing in CPA lasers thus supporting bandwidth much broader than a conventional CPA.
We present a theoretical and experimental analysis of two-grating phasing in a broadband pulse mosaic compressor. The phase defaults induced by misaligned gratings and the grating gap effect are studied in a mosaic compressor scheme.
We report the findings of a detailed study of the impact of the Vulcan OPCPA pre-amplifier on contrast. Using near-field apertures, the ASE pedestal was reduced to 4x10-8 of the intensity of the main pulse.
We present results in a comprehensive analysis of gain shaping from Nd:glass amplifiers in an effort to generate near 100 fs pulses in chirped pulse amplification. We discuss relative gain balance between the two media.
We demonstrate the highest contrast -1011 multi-terawatt CPA Ti:sapphire laser by applying a modified XPW method. This method produces a contrast improvement by direct amplification of the oscillator pulse without double CPA system.
Two temporally separated ultrashort pulses are interfered spectrally to obtain two-dimensional phase distribution of plasma waves generated by a terawatt laser. This technique allows micron-scale resolution in space with 14-fs time resolution.
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