A real-time acquisition system for pump-probe spectroscopy

Year: 2007

Authors: Bartolini P., Eramo R., Taschin A., De Pas M., Torre R.

Autors Affiliation: European Lab. for Non-Linear Spectroscopy (LENS), Universita` di Firenze, Via N. Carrara 1, I-50019 Sesto Fiorentino, Firenze, Italy;
INFM-CRS-Soft Matter (CNR), c/o Universita` la Sapienza, Piaz. A. Moro 2, I-00185, Roma, Italy; Dipartimento di Fisica, Universita` di Firenze, Via Sansone 1, I-50019 Sesto Fiorentino, Firenze, Italy

Abstract: An innovative acquisition system for time-resolved spectroscopy is presented. It is based on the real-time acquisition of the expermental signal during the rapid scan of an optical delay line and enables data acquisition With high absolute time resolution (1 femtosecond), high scanning velocity (2.5 cm/s) and long time delay (several nanoseconds). We report precise interferometric tests of the acquisition system, focusing on technical features of the optical delay line. We check this data acquisition technique by performing ultra-fast time-resolved experiments with laser sources of high an low repetition rates.

Journal/Review: PHILOSOPHICAL MAGAZINE

Volume: 87 (3-5)      Pages from: 731  to: 740

More Information: The research has been performed at LENS. We would like to thank R. Righini for his support in the present research. This work was also supported by EC grant No. RII3-CT-2003-506350, by CRS-INFM-Soft Matter (CNR) and MIUR-COFIN-2005 grant N. 2005023141-003. We thank Riccardo Ballerini for indispensable mechanical support, and Mauro Giuntini for providing continuous assistance in the set-up of the electronics.
KeyWords: Interferometry; Real time systems; Spectroscopic analysis; Velocity measurement, Laser sources; Pump-probe spectroscopy; Ultra-fast time-resolved experiments, Data acquisition
DOI: 10.1080/14786430600953780

Citations: 10
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