Coherence length
978-613-3-79247-0
6133792477
108
2010-10-29
39.00 €
eng
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Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. In physics, coherence length is the propagation distance from a coherent source to a point where an electromagnetic wave maintains a specified degree of coherence. The significance is that interference will be strong within a coherence length of the source, but not beyond it. This concept is also commonly used in telecommunication engineering. In long-distance transmission systems, the coherence length may be reduced by propagation factors such as dispersion, scattering, and diffraction. where c is the speed of light in a vacuum, n is the refractive index of the medium, and Δf is the bandwidth of the source.
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