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The Microbending Effect
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Microbending is an expression for some type of small inhomogenities in an optical fiber. They can be induced by application of pressure and cause loss of light from the fiber that otherwise would have been transmitted to its end. To detect pressure, light is fed into one end of an optical fiber and the amount of light arriving at its opposite end is measured, indicating pressure by a decrease of intensity. This working principle is very simple and makes it possible to produce a variety of sensors with unique properties. |
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