Publication

Inelastic Scatterings and Applications to Distributed Sensing

Luc Thévenaz
2011
Book Chapters

Abstract

Inelastic scatterings turn out to occupy an essential place in sensing applications, since they simply require a plain optical fibre as sensing element, with no special preparation. They give rise to energy and momentum transfers with the fibre material and make thus possible to access to material properties other than the simple optical linear response. In addition, inelastic scatterings can exist in a stimulated flavour that gives rise to dynamic couplings between all the waves involved in the interaction. This way efficient energy transfers between optical waves can be realized via the intercession of material vibrations to eventually generate optical amplification.

Official source

https://infoscience.epfl.ch/entities/publication/82a110fe-8886-431c-9337-d78c90bc797d

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Luc Thévenaz
2011
Book Chapters

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/82a110fe-8886-431c-9337-d78c90bc797d

About this result

Related concepts (32)

Raman scattering

Raman scattering or the Raman effect (ˈrɑːmən) is the inelastic scattering of photons by matter, meaning that there is both an exchange of energy and a change in the light's direction. Typically this effect involves vibrational energy being gained by a molecule as incident photons from a visible laser are shifted to lower energy. This is called normal Stokes Raman scattering. The effect is exploited by chemists and physicists to gain information about materials for a variety of purposes by performing various forms of Raman spectroscopy.

Energy

In physics, energy () is the quantitative property that is transferred to a body or to a physical system, recognizable in the performance of work and in the form of heat and light. Energy is a conserved quantity—the law of conservation of energy states that energy can be converted in form, but not created or destroyed. The unit of measurement for energy in the International System of Units (SI) is the joule (J).

Inelastic collision

An inelastic collision, in contrast to an elastic collision, is a collision in which kinetic energy is not conserved due to the action of internal friction. In collisions of macroscopic bodies, some kinetic energy is turned into vibrational energy of the atoms, causing a heating effect, and the bodies are deformed. The molecules of a gas or liquid rarely experience perfectly elastic collisions because kinetic energy is exchanged between the molecules' translational motion and their internal degrees of freedom with each collision.

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