Glossary

absorption: When referring to light, the conversion of specific wavelengths of light energy into heat through contact with impurities such as water or ions of copper or chromium. Absorption is one of the ways in which light can be lost during transmission through optical fiber.
acceptance angle: The angle within which light can enter a fiber core of a given numerical aperture and still reflect off of the boundary layer between the core and the cladding. The acceptance angle is also known as the cone of acceptance.
amplifier: A device used to increase the power of an optical signal.
amplitude modulation: The creation of a signal by changing the strength of a carrier such as a beam of light.
analog: A signal that varies continuously through time in response to an input. An analog signal is infinitely variable within a specified range.
analog to digital (A/D) converter: A device that converts analog signals into digital signals for storage or transmission.
angle of incidence: The angle of a ray of light striking a surface or boundary as measured from a line drawn perpendicular to the surface. Also called incident angle.
angle of refraction: The angle of a ray of light that is refracted as it passes through an interface, as measured from a line drawn perpendicular to the interface.
angled PC (APC): A connector in which the ferrule is polished at an angle to ensure physical contact with the ferrule of another APC connector.
angular misalignment: The...

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Fiber Optics Installer and Technician Guide

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