Contrast improvement of sub-4  fs laser pulses using nonlinear elliptical polarization rotation

Temporal-intensity contrast is crucial in intense laser-matter interaction to circumvent the undesirable expansion of steep high-density plasma prior to the interaction with the main pulse. Nonlinear elliptical polarization rotation in an argon filled hollow-core fiber is used here for cleaning pede...

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Bibliographic Details
Published in:Optics letters 2019-08, Vol.44 (16), p.4028
Main Authors: Smijesh, N, Zhang, X, Fischer, P, Muschet, A A, Salh, R, Tajalli, A, Morgner, U, Veisz, L
Format: Article
Language:English
Subjects:
Argon
Elliptical polarization
Lasers
Pulse cleaning
Rotation
Sapphire
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Summary:Temporal-intensity contrast is crucial in intense laser-matter interaction to circumvent the undesirable expansion of steep high-density plasma prior to the interaction with the main pulse. Nonlinear elliptical polarization rotation in an argon filled hollow-core fiber is used here for cleaning pedestals/satellite pulses of a chirped-pulse-amplifier based Ti:Sapphire laser. This source provides ∼35   energy and sub-4-fs duration, and the process has >50 internal efficiency, more than the most commonly used pulse cleaning methods. Further, the contrast is improved by 3 orders of magnitude when measured after amplifying the pulses to 16 TW using non-collinear optical parametric chirped pulse amplification with a prospect to even further enhancement.
ISSN:0146-9592
1539-4794
1539-4794
DOI:10.1364/OL.44.004028