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We present a contrast filter reaching 12 orders of magnitude from micro to milliJoule input pulse with 24% efficiency. It solves contrast issue for Petawatt class lasers in microjoule seeded CPA or double CPA scheme.
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.
Efficient reflection prisms for pulse compression and material-dispersion compensation have been designed and demonstrated in a CPA system. Designs for 800-nm and 1030-nm ultrafast applications are realized using off-the-shelf diffraction gratings.
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 efficient pulse shaping using linearly-chirped gratings fabricated with amplitude masks, based on a novel forward-correction algorithm that maximizes conversion efficiency. ~20% efficiency is achieved experimentally, and can potentially reach >70% with appropriate chirp.
We demonstrate a simple, all-fiber technique for removing nonlinear phase on a pulse-to-pulse basis in a fiber-based CPA system. Removal of 1.0 pi of nonlinear phase is achieved.
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