Nonlinear phenomena induced by infrared laser light

Research output: Contribution to journalArticle

Abstract

Different nonlinear phenomena arised at IR laser-solid interaction at existence of positive feedback between the "thermal' and "chemical" degrees of freedom of the system through the change of absorption characteristics of the target are discussed. It is shown experimentally that varying the control parameters ( P m, where P = power of the light, m= mass of the target) different spatio-temporal structures such as, periodical-, stochastic- and autooscillations of thermal field on the irradiated surface due to CW and pulsed IR lasers could be registered (which could be described by s.c. order parameters). The observed events of self-organization types are explained in frames of theory of instabilities connected with temperature dependence of surface tension of melted material and temperature gradient caused Rayleigh like convections.

Original languageEnglish
Pages (from-to)349-356
Number of pages8
JournalInfrared Physics
Volume32
Issue numberC
DOIs
Publication statusPublished - 1991

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Infrared lasers
infrared lasers
positive feedback
Solid state lasers
Thermal gradients
Surface tension
pulsed lasers
temperature gradients
interfacial tension
convection
degrees of freedom
Feedback
gradients
temperature dependence
Lasers
interactions
Temperature
Hot Temperature
Convection

Cite this

Nonlinear phenomena induced by infrared laser light. / Nánai, L.

In: Infrared Physics, Vol. 32, No. C, 1991, p. 349-356.

Research output: Contribution to journalArticle

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