Glass is an amorphous solid that exhibits a limited short-range order and, unlike crystal lattices with infinite periodicity, retains a completely random organization structure on a long-range scale. Glass is most often formed by the rapid cooling of the molten form. It is widely used in fiber optics, namely, communication lines – the basis of the Internet; telephone and local television networks; and optical signal distribution devices.
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Raman scattering in telecommunication networks requires materials with broad Raman gain profiles. For example, silica is known for its very low loss and ability to serve as a carrier medium, although it has a relatively low gain. Spontaneous Raman spectroscopy has proven an effective method of express evaluation of the glass Raman gain coefficient over a wide frequency range. Raman amplifiers have also been growing in popularity due to the development of broadband optical fiber.
Raman spectroscopy can uniquely identify many chemical and biological agents.All substances