Hydroxyl ion absorption is the absorption in optical fibres of electromagnetic waves, including the near-infrared, due to the presence of trapped hydroxyl ions remaining from water as a contaminant. Absorption, in optics, is the process by which the energy of a photon is taken up by another entity, for example, by an atom whose valence electrons make a transition between two electronic energy levels. ... Fiber Optic strands An optical fiber in American English or fibre in British English is a transparent thin fiber for transmitting light. ... Electromagnetic radiation is a propagating wave in space with electric and magnetic components. ... For other uses, see Infrared (disambiguation). ... // Hydroxyl group The term hydroxyl group is used to describe the functional group -OH when it is a substituent in an organic compound. ...

The hydroxyl (OH^-) ion can penetrate glass during or after product fabrication, resulting in significant attenuation of discrete optical wavelengths, e.g. , centred at 1.383 μm, used for communications via optical fibres. This article is about the material. ... This article is about Physics. ... Copy of the original phone of Alexander Graham Bell at the Musée des Arts et Métiers in Paris Telecommunication is the assisted transmission of signals over a distance for the purpose of communication. ...

See also

Water absorption Solar spectrum above the atmosphere (blue curve) and transmitted to the Earths surface (orange curve) showing major absorption bands. ...