Journal ArticleDOI
Optimizing and calibrating a mode-mismatched thermal lens experiment for low absorption measurement
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In this article, a two-beam mode-mismatched thermal lens experiment aimed at determination of the absorption coefficient and the photothermal parameters of a nearly transparent material is described.Abstract:
We describe a calibrated two-beam mode-mismatched thermal lens experiment aimed at determination of the absorption coefficient and the photothermal parameters of a nearly transparent material. The use of a collimated probe beam in the presence of a focused excitation beam optimizes the thermal lens experiment. The signal becomes independent from the Rayleigh parameters and waist positions of the beams. We apply this method to determine the absolute value of the thermal diffusivity and absorption coefficient of distilled water at 533 nm.read more
Citations
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Absorption coefficient of nearly transparent liquids measured using thermal lens spectrometry
TL;DR: In this article, the authors would like to thank Fondo Nacional para Ciencia y la Tecnologia, Fonacit, Caracas, Venezuela (Grant G97000593), the Latin American Center of Physics (CLAF) and the ICTP.
Journal ArticleDOI
A thermal lens model including the Soret effect
TL;DR: In this article, the thermal lens model was generalized to account for the Soret effect in binary liquid mixtures, and the theory was experimentally verified using the measured values in the ethanol/water mixtures.
Journal ArticleDOI
Ultrasensitive thermal lens spectroscopy of water.
TL;DR: From 3 to 0.3 mm, the water absorption coefficient drops 8 orders of magnitude, reaching a minimum at ∼ 0.4, but the wavelength and value of the minimum absorption is still unclear.
Journal ArticleDOI
Quantum yield excitation spectrum (UV-visible) of CdSe/ZnS core-shell quantum dots by thermal lens spectrometry
TL;DR: In this article, a thermal lens spectrometry configuration has been used to study CdSe/ZnS core-shell quantum dots (QDs) suspended in toluene and tetrahydrofuran (THF) solvents.
Journal ArticleDOI
Optical observation of shock waves and cavitation bubbles in high intensity laser-induced shock processes
TL;DR: An experimental study of the temporal and spatial dynamics of shock waves, cavitation bubbles, and sound waves generated in water during laser shock processing by single Nd:YAG laser pulses of nanosecond duration is reported.
References
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Journal ArticleDOI
Absorption spectrum (380–700 nm) of pure water. II. Integrating cavity measurements
Robin M. Pope,Edward S. Fry +1 more
TL;DR: Definitive data on the absorption spectrum of pure water from 380 to 700 nm have been obtained with an integrating cavity technique and several spectroscopic features have been identified in the visible spectrum to the knowledge for the first time.
Journal ArticleDOI
Long‐Transient Effects in Lasers with Inserted Liquid Samples
TL;DR: In this paper, buildup and decay transients were observed when polar or nonpolar liquid cells were placed within the resonator of a helium-neon laser operating in the red at 6328 A.
Book
Photothermal spectroscopy methods for chemical analysis
TL;DR: In this paper, the principles for photothermal spectroscopy of homogeneous samples are discussed. But they do not consider the effect of the temperature change and optical elements in homogeneous sample.
Journal ArticleDOI
A model for cw laser induced mode-mismatched dual-beam thermal lens spectrometry
TL;DR: In this paper, the aberrant nature of the thermal lens was taken into account and a theoretical model for the mode-mismatched, mode-matched dual-beam and single-beam methods was presented.