Abstract

We report the first results from a new pump/probe technique called asynchronous optical sampling (ASOPS). The method employs a mode-locked, frequency-doubled Nd: YAG laser operating at a repetition rate of 81.5970000 MHz as the pump laser, and a synchronously pumped dye laser (R6G) operating at a repetition rate of 81.5870000 MHz as the probe laser system. The 10-kHz beat frequency produces a repetitive relative phase walk-out of the pump and probe pulses which replaces the optical delay line used in conventional instruments. Studies of rhodamine B in methanol demonstrate that the instrument response is proportional to pump power, probe power, and sample absorptance. The fluorescence lifetime of 4 × 10⁻⁵ M rhodamine B is determined to be 2.3 ns.

Pump/probe method for fast analysis of visible spectral signatures utilizing asynchronous optical sampling

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Arbitrary-detuning asynchronous optical sampling pump-probe spectroscopy of bacterial reaction centers

Laura Antonucci, Adeline Bonvalet, Xavier Solinas, Michael R. Jones, Marten H. Vos, and Manuel Joffre
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Measurements of atomic sodium in flames by asynchronous optical sampling: theory and experiment

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Asynchronous optical sampling:a new combustion diagnostic for potential use in turbulent, high-pressure flames

R. J. Kneisler, F. E. Lytle, G. J. Fiechtner, Y. Jiang, G. B. King, and N. M. Laurendeau
Opt. Lett. 14(5) 260-262 (1989)

Quantitative concentration measurements of atomic sodium in an atmospheric hydrocarbon flame with asynchronous optical sampling

Gregory J. Fiechtner, Galen B. King, and Normand M. Laurendeau
Appl. Opt. 34(6) 1117-1126 (1995)