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fiberstudent
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hello,i just want to know how the fiber bragg grating is being affected by the pressure that act on it? and where is the reference that i can refer to further reading..thanks
A fiber Bragg grating (FBG) is a type of optical fiber component that consists of a periodic variation in the refractive index of the fiber core. This periodic structure acts as a wavelength-specific reflector, allowing the FBG to selectively reflect certain wavelengths of light while transmitting the rest.
When light is transmitted through an FBG, certain wavelengths are reflected back due to the periodic structure, while others pass through. This creates a spectral response that can be used to measure various physical parameters, such as strain or pressure, as the reflected wavelengths shift based on the changes in the fiber's environment.
Compared to traditional pressure sensors, FBGs offer several advantages, including high sensitivity, fast response time, and immunity to electromagnetic interference. They are also small, lightweight, and can be embedded in structures or devices without affecting their performance.
FBGs can be embedded in pressure-sensitive materials, such as polymers or composites, to measure changes in strain or pressure. They can also be attached to the surface of a structure or device using adhesives or clamps. When pressure is applied, the FBG will reflect different wavelengths of light, which can be measured and used to calculate the pressure.
FBGs have a wide range of applications in pressure sensing, including monitoring the pressure inside pipelines, measuring the pressure in tires or engines, and detecting changes in pressure in biomedical devices. They are also used in industries such as aerospace, automotive, and oil and gas for structural health monitoring and process control.