The first in-fiber Bragg grating was demonstrated by Ken Hill in 1978. Initially, the gratings were fabricated using a visible laser propagating along the fiber core. In 1989, Gerald Meltz … See more

The fundamental principle behind the operation of an FBG is Fresnel reflection, where light traveling between media of different refractive … See more

The structure of the FBG can vary via the refractive index, or the grating period. The grating period can be uniform or graded, and either localised or distributed in a superstructure. The refractive index has two primary characteristics, the refractive index profile, and … See more

Communications
The primary application of fiber Bragg gratings is in optical communications systems. They are … See more

The term type in this context refers to the underlying photosensitivity mechanism by which grating fringes are produced in the fiber. The different methods of creating these fringes have a significant effect on physical attributes of the produced grating, particularly the … See more

Fiber Bragg gratings are created by "inscribing" or "writing" systematic (periodic or aperiodic) variation of refractive index into the core of a special type of optical fiber using an intense ultraviolet (UV) source such as a UV laser. Two main … See more

• Bragg's law
• Dielectric mirror
• Diffraction
• Distributed temperature sensing by fiber optics
• Hydrogen sensor See more