A method of making a multimode or single-mode coupler by wrapping fibers together, heating them, and pulling them to form a central unified mass so that light on any input fiber is coupled to all output fibers.
Fused Fiber
A bundle of fibers fused together so they maintain a fixed alignment with respect to each other in a rigid rod.
Fusible
Capable of being melted or fused together by melting
G Giga
One billion.
GaALAs
(Gallium aluminum arsenide) Generally used for short wavelength light emitters.
GaAS
(Gallium arsenide) Used in light emitters.
Gallon, U.S
A volume equal to 231 cubic inches measured at 25°C. (77°F).
Eutectic
The minimum melting point of a combination of two or more materials. The eutectic temperature of an alloy is always lower than the melting point of any of its individual constituents. The eutectic temperature is the particular temperature at which the eutectic occurs. Eutectic alloys, when heated, transform directly from a solid to a liquid and do not show any pasty regions. For example, eutectic solder paste has a composition of 63% tin (Sn) and 37% lead (Pb), and has a eutectic temperature of 183°C.
Evacuation
The removal of entrained air from an epoxy system by vacuum. Also referred to as degassing.
EV
Eletric Vehicle.
Exotherm
The liberation of heat energy during a chemical reaction. Exotherm is increased in large masses.
F Fahrenheit
Measure of temperature where water freezes at 32° and boils at 212°.
Failure
The temporary or permanent functional impairment of a component or device caused by physical, mechanical, chemical, or electrical damage.
Failure Rate
The number of failures of a device per unit of time.
Failure, Adhesive
The failure at the bond line between substrates and an adhesive; the adhesive separating entirely from the substrate.
Failure, Cohesive
Failure within the adhesive under a stress, resulting in a broken bond with all adhered surfaces still covered with adhesive.
Failure, Substrate
The failure of the substrate material itself, upon subjecting bonded adhered surfaces to a stress.
Faraday Effect
A phenomenon that causes some materials to rotate the polarization of light in the presence of a magnetic field parallel to the direction of propagation. Also called magneto-optic effect.
Ferrule
A rigid tube that confines or holds a fiber as part of a connector assembly.
Fiber Bundle
Refers to the collection of individual fibers that supply light to the fixture. These fibers are held together and protected by the sheathing.