Pump-probe micro-spectroscopy by means of an ultra-fast acousto-optics delay line

Authors :: Xavier Audier
Hervé Rigneault
Naveen K. Balla
MOSAIC (MOSAIC)
Institut FRESNEL (FRESNEL)
Centre National de la Recherche Scientifique (CNRS)-École Centrale de Marseille (ECM)-Aix Marseille Université (AMU)-Centre National de la Recherche Scientifique (CNRS)-École Centrale de Marseille (ECM)-Aix Marseille Université (AMU)
Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS)
Source :: Optics Letters, Optics Letters, Optical Society of America-OSA Publishing, 2017, 42 (2), pp.294. ⟨10.1364/OL.42.000294⟩, Optics Letters, 2017, 42 (2), pp.294. ⟨10.1364/OL.42.000294⟩
Publication Year :: 2017
Publisher :: The Optical Society, 2017.
Abstract: International audience; We demonstrate femtosecond pump-probe transient absorption spectroscopy using a programmable dispersive filter as an ultra-fast delay line. Combined with fast synchronous detection this delay line allows for recording of 6 ps decay traces at 34 kHz. With such acquisition speed we perform single point pump-probe spectroscopy on bulk samples in 80 µs and hyperspectral pump-probe imaging over a field of view of 100 µm in less than a second. The usability of the method is illustrated on a showcase experiment to image and discriminate two pigments in a mixture.

Tools