Fiber Bragg Gratings – FBG, index modulation, filters, fiber-optic sensors
The reflection bandwidth of a fiber grating, which is typically well below 1 nm, depends on both the length and the strength of the refractive index modulation.
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The reflection bandwidth of a fiber grating, which is typically well below 1 nm, depends on both the length and the strength of the refractive index modulation. A fiber Bragg grating (FBG) is a type of distributed Bragg reflector constructed in a short segment of optical fiber that reflects particular wavelengths of light and transmits all others. Near thes th wi lt compresses t engt bandwidth and maximum reflectivity accor Fig. Strong modulations with a reflectivity ampli-tude decrease by up to 67% and a 57% bandwidth increase in the Bragg resonance are obtained for gratings of 0.
