Scientific Results

Picosecond optical parametric generator and amplifier for large temperature-jump

Year: 2014

Authors: Citroni M., Fanetti S., Guigue B., Bartolini P., Taschin A., Lapini A., Foggi P., Bini R.

Autors Affiliation: LENS – European Laboratory for Non-Linear Spectroscopy, via N. Carrara 1, Sesto F.no, Florence, 50019, Italy; Dipartimento di Chimica Ugo Schiff, University of Florence, via della Lastruccia 3, Sesto F.no (FI), 50019, Italy; INO – Istituto Nazionale di Ottica, Largo E. Fermi 6, Firenze, 50125, Italy; Dipartimento di Chimica, University of Perugia, Via Elce di sotto 8, Perugia, I-06123, Italy

Abstract: An optical parametric generator and amplifier producing 15 ps pulses at wavelengths tunable around 2 mu m, with energies up to 15 mJ/pulse, has been realized and characterized. The output wavelength is chosen to match a vibrational combination band of water. By measuring the induced birefringence changes we prove that a single pulse is able to completely melt samples of ice in the 10(-6) cm(3) volume range, both at room pressure (263 K) and at high pressure (298 K, 1 GPa) in a sapphire anvil cell. This source opens the possibility of studying melting and freezing processes by spectroscopic probes in water or water solutions in a wide range of conditions as found in natural environments. (C) 2014 Optical Society of America.

Journal/Review: OPTICS EXPRESS

Volume: 22 (24)      Pages from: 30047  to: 30052

More Information: Supported by “Physics and Chemistry of Carbon at Extreme Conditions” project, and by MIUR (grant FIRB – Futuro in Ricerca 2010 RBFR109ZHQ).
KeyWords: Birefringence; Light amplifiers; Sapphire; Ultrashort pulses, Combination bands; Induced birefringence; Natural environments; Optical parametric generator; Output wavelengths; Sapphire anvil cell; Spectroscopic probes; Temperature jump, Optical parametric amplifiers, ice, amplifier; birefringence; freezing; light related phenomena; signal processing; temperature; time, Amplifiers, Electronic; Birefringence; Freezing; Ice; Optical Phenomena; Signal Processing, Computer-Assisted; Temperature; Time Factors
DOI: 10.1364/OE.22.030047

Citations: 2
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