New design of double-beam pico/nanosecond laser spectrometers and their performance in transient absorption study of xanthione

M. Szymanski

doi:10.1117/12.280493

14 August 1997 New design of double-beam pico/nanosecond laser spectrometers and their performance in transient absorption study of xanthione

M. Szymanski

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Proceedings Volume 3186, Laser Technology V: Physics and Research and Development Trends; (1997) https://doi.org/10.1117/12.280493
Event: Laser Technology V, 1996, Szczecin, Poland

Abstract

A new experimental solution of a picosecond transient absorption spectrometer with a high power pulse YAG:Nd³⁺ laser has been developed and tested in studies of photophysical and spectral properties of molecular systems. The analyzing beam is the 'white' light of the picosecond continuum generated by the 1064 nm beam in isopropanol. The optical delay line of 20 cm travel range permits investigation of the processes occurring in the time scale to 1.3 ns with the time step of approximately 3 fs. The system was used to study the interaction of the excited xanthione molecules with alkanes and benzene occurring in the picosecond time scale. The paper describes also the design and performance of a double-beam pulse spectrometer use for measuring in the real time, changes in transient absorption evolution of emission and dynamics of the ground state depletion of molecular media. The technique of digital recording and data processing at the sampling rate of 2 gigasamples/s ensures a resolution of single nanoseconds in the time interval up to 10 microseconds. The spectrometer has been successfully tested in photophysical studies of the triplet states of xanthione in benzene and n- hexane solutions.

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M. Szymanski "New design of double-beam pico/nanosecond laser spectrometers and their performance in transient absorption study of xanthione", Proc. SPIE 3186, Laser Technology V: Physics and Research and Development Trends, (14 August 1997); https://doi.org/10.1117/12.280493

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KEYWORDS

Spectroscopy

Absorption

Laser spectroscopy

Picosecond phenomena

Laser development

Molecular spectroscopy

Beam analyzers

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