Analysis of Optical Fibers Coatings by Stimulated Brillouin Scattering (CAT#: STEM-ST-0111-YJL)

Name: Analysis of Optical Fibers Coatings by Stimulated Brillouin Scattering
SKU: STEM-ST-0111-YJL
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Introduction

The coating layers of brittle silica optical fibers are essential for their handling and deployment outside the research laboratory. In most applications, standard fibers are coated with thin polymer layers. Monitoring the elastic properties of these layers is important for research and development of new coating materials, production line quality control, reliability testing and preventive maintenance. In addition, elastic parameters of coating layers may be modified following adsorption of chemicals, and their assessment can serve towards sensing applications.

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Principle Applications Procedure Materials

Principle

From a quantum point of view, Brillouin scattering is an interaction of light photons with acoustic or vibrational quanta (phonons), with magnetic spin waves (magnons), or with other low frequency quasiparticles interacting with light. The interaction consists of an inelastic scattering process in which a phonon or magnon is either created (Stokes process) or annihilated (anti-Stokes process). The energy of the scattered light is slightly changed, that is decreased for a Stokes process and increased for an anti-Stokes process. This shift, known as the Brillouin shift, is equal to the energy of the interacting phonon and magnon and thus Brillouin scattering can be used to measure phonon and magnon energies.