FOA offers corporate memberships to companies involved in fiber optics as manufacturers, contractors, installers, etc.
Abbreviation for analog-to-digital converter. A device used to convert analog signals to digital signals. That portion of optical attenuation in optical fiber resulting from the conversion of optical power to heat.
Caused by impurities in the fiber such as hydroxyl ions. Abbreviation for alternating current. An electric current that reverses its direction at regularly recurring intervals. The half-angle of the cone a within which incident light is totally internally reflected by the fiber core.
It is equal to sin-1 NA. A device that requires a source of energy for its operation and has an output that is a function of present and past input signals.
Examples include controlled power supplies, transistors, LEDs, amplifiers, and transmitters. Abbreviation for add-drop multiplexer. A device which adds or drops signals from a communications network. Abbreviation for asynchronous digital subscriber line.
Cable that is suspended in the air on telephone or electric utility poles. Abbreviation for automatic gain control. A process or means by which gain is automatically adjusted in a specified manner as a function of input level or another specified parameter. Abbreviation for amplitude modulation.
A transmission technique in which the amplitude of the carrier varies in accordance with the signal. A background noise mechanism common to all types of erbium-doped fiber amplifiers EDFAs. Amplifier A device, inserted within a transmission path, that boosts the strength of an electronic or optical signal.
Amplifiers may be placed just after the transmitter power boosterat a distance between the transmitter and the receiver in-line amplifieror just before the receiver preamplifier.
A continuously variable signal. Loss at a connector due to fiber end face angles being misaligned.A specialty fiber called the Polarization Maintaining (PM) Fiber intentionally creates consistent birefringence pattern along its length, prohibiting coupling between the two orthogonal polarization directions.
In any design, the geometry of the fiber and the materials used create a large amount of stress in one direction, and thus create high birefringence compared to that generated by the.
In the s, physicists Daniel Collodon and Jacques Babinet showed that light could be directed along jets of water for fountain displays. In , John Tyndall, a British physicist, demonstrated that light could travel through a curved stream of water thereby proving that a light signal could be bent.
An optical fiber or optical fibre is a flexible, transparent fiber made by drawing glass or plastic to a diameter slightly thicker than that of a human hair. A/B Switch. A device that accepts inputs (optical or electrical) from a primary path and a secondary path to provide automatic or manual switching in the event that the primary path signal is .
Try this fiber-optic experiment! This nice little experiment is a modern-day recreation of a famous scientific demonstration carried out by Irish physicist John Tyndall in You hear about fiber-optic cables whenever people talk about the telephone system, the cable TV system or the Internet.
Fiber-optic lines are strands of optically pure glass as thin as a human hair that carry digital information over long distances. They are also used in medical imaging and.