Reflection loss
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In telecommunications, reflection loss occurs on a line which results in part of the energy being reflected back to the source. This can occur:
- At a discontinuity or impedance mismatch, e.g. in a transmission line, the ratio of the incident power to the reflected power. Reflection loss is usually expressed in dB.
- In an optical fiber, the loss that takes place at any discontinuity of refractive index, especially at an air-glass interface such as a fiber endface, at which a fraction of the optical signal is reflected back toward the source. This reflection phenomenon is also called "Fresnel reflection loss," or simply "Fresnel loss."
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