TIA's Glossary of Telecommunication Terms

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lateral offset loss

1. In fiber optics, a loss of optical power at a splice or connector, caused by a lateral, i.e. , transverse, offset of the mating fiber cores, which offset causes an imperfect transfer of the optical signal from the "transmitting" fiber to the "receiving" fiber. Note: The effect of a given amount of lateral offset will depend on other parameters such as the relative diameters of the respective cores. For example: if, because of manufacturing tolerances, the "transmitting" core is smaller than the "receiving" core, the effect will be less than if both cores were the same size. [After FAA] 2. An analogous loss of optical power caused by lateral misalignment of the fiber and optical source. [FAA] Synonym transverse offset loss.