ASE contrast improvement with a non-linear filtering Sagnac interferometer

ASE contrast improvement with a non-linear filtering Sagnac interferometer

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 emissio...

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Veröffentlicht in:Optics communications 2005-04, Vol.248 (4-6), p.535-541
Hauptverfasser: Renault, Amandine, Augé-Rochereau, Frédérika, Planchon, Thomas, D’Oliveira, Pascal, Auguste, Thierry, Chériaux, Gilles, Chambaret, Jean-Paul
Format: Artikel
Sprache:eng
Schlagworte:
Contrast
Design of specific laser systems
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Instruments, apparatus, components and techniques common to several branches of physics and astronomy
Interferometers
Laser optical systems: design and operation
Non-linear filter
Nonlinear optics
Optical instruments, equipment and techniques
Optics
Physics
Sagnac interferometer
Ultrafast processes
optical pulse generation and pulse compression
Ultrashort pulses
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Beschreibung
Zusammenfassung: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 1kHz, 55fs, 1mJ Ti:Sa laser were performed. The temporal contrast measurements have shown a contrast improvement of four orders of magnitude.
ISSN:0030-4018
1873-0310
DOI:10.1016/j.optcom.2004.12.038