1. ASE contrast improvement with a non-linear filtering Sagnac interferometer
- Author
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Jean-Paul Chambaret, Thierry Auguste, Amandine Renault, Pascal D'Oliveira, Thomas A. Planchon, Frédérika Augé-Rochereau, Gilles Chériaux, Laboratoire d'optique appliquée (LOA), École Nationale Supérieure de Techniques Avancées (ENSTA Paris)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Amplitude Technologies, Centre d'Etudes de Saclay, and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)
- Subjects
Amplified spontaneous emission ,media_common.quotation_subject ,02 engineering and technology ,01 natural sciences ,Ultrashort pulses ,law.invention ,Non-linear filter ,010309 optics ,020210 optoelectronics & photonics ,Optics ,law ,0103 physical sciences ,0202 electrical engineering, electronic engineering, information engineering ,Contrast (vision) ,Electrical and Electronic Engineering ,Physical and Theoretical Chemistry ,media_common ,Physics ,[PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics] ,Pulse (signal processing) ,business.industry ,PACS 42.60.By ,42.62 ,42.65.Re ,42.65.-k ,07.60.L ,Contrast ,Laser ,Atomic and Molecular Physics, and Optics ,Electronic, Optical and Magnetic Materials ,Interferometry ,Orders of magnitude (time) ,business ,Sagnac interferometer ,Ultrashort pulse ,Gaussian beam - Abstract
International audience; 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.
- Published
- 2005
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