Does manufacturing fiber optic gratings require a dust-free environment
Written in both hydrogenated and non-hydrogenated fiber of all types, type I gratings are usually known as standard gratings and are manufactured in fibers of all types under all hydrogenation conditions. The fundamental principle behind the operation of an FBG is, where light traveling between media of different refractive indices may both and at the interface. The term type in this context refers to the underlying mechanism by which grating fringes are produced in the fiber. The grating period can be uniform or graded, and either localised or distributed in a superstructure.
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