Short-pulse-induced solute migration in the C49H43ClO6 + 1,2 dichloroethane solution.
J Chem Phys
; 149(4): 044304, 2018 Jul 28.
Article
em En
| MEDLINE
| ID: mdl-30068192
ABSTRACT
Using the Z-scan technique with 532 nm 19 ps laser pulses separated by two time intervals τp-p's (0.1 s and 1.0 s) sandwiching the mass diffusion time constant of the C49H43ClO6 + 1,2 dichloroethane solution, we investigate short-pulse-induced solute migration in the sample by measuring its transmittance change with τp-p variation. Preparing the sample at two concentrations, we find that τp-p reduction, from 1.0 s to 0.1 s, increases its transmittance when input pulse energy ε1 exceeds a threshold εT, which is lower for the dilute solution than the concentrated one. At two ε1's above εT for the dilute solution, τp-p-reduction-induced transmittance increase in the dilute solution, as compared to that in the concentrated solution, is more at the lower ε1 and less at the higher ε1. This differs from continuous-wave-driven thermal diffusion which always causes a larger transmittance increase in the concentrated solution by inducing a larger temperature gradient. From this study, we predict that solute migration induced by short pulses at 1064 nm is one of the undesired heating effects occurring when this solution is used to simultaneously Q-switch and mode-lock NdYAG lasers.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Tipo de estudo:
Prognostic_studies
Idioma:
En
Revista:
J Chem Phys
Ano de publicação:
2018
Tipo de documento:
Article
País de afiliação:
Taiwan