FaserBraggGitter
FaserBraggGitter, often referred to as a fiber Bragg grating (FBG) in English, is a type of optical reflector fabricated in an optical fiber by creating a periodic modulation of the core refractive index. The resulting structure acts as a distributed Bragg reflector, reflecting light around a specific wavelength while transmitting other wavelengths.
Principle: The reflected Bragg wavelength λB is approximately 2 n_eff Λ, where n_eff is the effective refractive
Fabrication: FBGs are inscribed in photosensitive silica fibers by ultraviolet exposure. The common phase-mask technique uses
Applications: In telecommunications, FBGs serve as narrowband reflectors and filters in fiber lasers and in wavelength-division
Advantages and limitations: FaserBraggGitter are compact, passive, immune to electromagnetic interference, and compatible with existing fiber
Historically: The technology was demonstrated in the late 1970s by researchers such as Hill and Meltz at
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