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Suppression of gain narrowing in multi-TW lasers with negatively and positively chirped pulse amplification

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Abstract

A laser scheme implementing a combination of negatively and positively chirped pulse amplification (NPCPA) is demonstrated. This method of amplification suppresses spectral narrowing typically appearing in chirped pulse amplification (CPA) lasers thus supporting pulse spectrum much broader than a conventional CPA. With a NPCPA Ti:Sapphire laser we have achieved laser pulses of 50 nm spectral width and 150 mJ energy without any additional spectral correction. The scheme appears as an easy and reliable solution to preserve spectral bandwidth in Ti:Sapphire lasers, especially at high power levels up to the Petawatt regime.

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Correspondence to K. Osvay.

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42.60 By, Lh; 42.65 Re

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Kalashnikov, M., Osvay, K., Lachko, I. et al. Suppression of gain narrowing in multi-TW lasers with negatively and positively chirped pulse amplification. Appl. Phys. B 81, 1059–1062 (2005). https://doi.org/10.1007/s00340-005-2009-9

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  • DOI: https://doi.org/10.1007/s00340-005-2009-9

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