ASE contrast improvement with a non-linear filtering Sagnac interferometer

Abstract : A new method to improve the temporal contrast of an ultra-short laser pulse has been developed. This technique uses a Sagnac interferometer in combination with a non-linear medium. A phase shift induced in the ultra-short pulse by non-linear effect separates it from the amplified spontaneous emission background. Experiments with a 1 kHz, 55 fs, 1 mJ Ti:Sa laser were performed. The temporal contrast measurements have shown a contrast improvement of four orders of magnitude.
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Submitted on : Thursday, October 14, 2010 - 4:05:46 PM
Last modification on : Wednesday, July 3, 2019 - 10:48:02 AM

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Amandine Renault, Frederika Auge-Rochereau, Thomas Planchon, Pascal d'Oliveira, Thierry Auguste, et al.. ASE contrast improvement with a non-linear filtering Sagnac interferometer. Optics Communications, Elsevier, 2005, 248 (4-6), pp.535-541. ⟨10.1016/j.optcom.2004.12.038⟩. ⟨hal-00526452⟩

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