Mismatched Mode Thermal Lens for Assessing Thermal Diffusivity of Serum and Plasma from Human Blood

Probing Intermolecular Interaction through Thermal-Lens Spectroscopy

“…The thermo-optic coefficient of the mixture can be calculated by differentiating the refractive index with temperature. The thermo-optic coefficient of the mixture is given by (6) (7) (8) In eq 8, the variation of the density with temperature at constant pressure has been replaced by the product of the density (ρ) and the coefficient of thermal expansion (β) of the solution as well as the corresponding β i ρ i of two components of the solution. Using these phenomenological models, we calculate the various physical parameters and TL signal for all our binary solutions under ideal theoretical conditions providing us an opportunity to correlate the deviations of these calculated values as compared to our experimental TL signals generated from eq 1.…”

“…[1][2][3][4][5][6] TL spectroscopy is also widely used in characterizing absorptive materials. 7 The TL effect 8 was reported as early as 1965; however, the development of an extra-cavity single-beam thermallens spectrometer 9 came as late as 1973.…”

“…Thermal-lens (TL) spectroscopy has several potential applications in molecular and solid-state spectroscopy, such as material testing, combustion studies, plasma diagnostics, as well as research in heat diffusion, transport phenomena, and phase transition studies. − TL spectroscopy is also widely used in characterizing absorptive materials . The TL effect was reported as early as 1965; however, the development of an extra-cavity single-beam thermal-lens spectrometer came as late as 1973.…”

Probing Intermolecular Interactions in Binary Liquid Mixtures Using Femtosecond Laser-Induced Self-Defocusing

“…The TL process has pronounced importance in molecular and solid-state laser engineering applications and as such there have been several reports on TL effect. [1][2][3][4][5][6][7][8][9] The thermal lens effect has also led to the development of TL spectroscopy, 10,11 which is widely used in the characterization of absorptive materials. Several improvements, such as the extra-cavity single-beam thermal-lens spectrometer and dual-beam Z-scan technique, have resulted in TL spectroscopy.…”

An analytical model for top-hat long transient mode-mismatched thermal lens spectroscopy

“…For a transparent sample, by measuring the beam divergence or intensity drop at the beam center with a small photo-detector placed at the other end of the sample, the thermal and optical properties of the sample can be measured [13,14]. The so-called thermal lens spectroscopy is being used in many applications including material testing [15], combustion studies [16], plasma diagnostics [17], heat diffusion researches [18] and phase transitions studies [19,20]. In some researches, such as Ref.…”