From Optical Networking Best Practices Handbook

Absorption: The portion of optical attenuation in an optical fiber resulting from the conversion of optical power to heat; caused by impurities such as hydroxyl ions in the fiber.

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 broken or otherwise disrupted. In optical A/B switches, optical signal power thresholds dictate whether the primary path is functioning and signals a switch to the secondary path until optical power is restored to the primary path.

AC: Alternating current. An electric current that reverses its direction at regularly recurring intervals.

Acceptance Angle: The half-angle of the cone within which incident light is totally internally reflected by the fiber core. It is equal to sin–1(NA), where NA is the numerical aperture.

Active Device: 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.

A/D or ADC: Analog-to-digital converter. A device used to convert analog signals to digital signals.

Add/Drop Multiplexing: A multiplexing...

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© 2015 John Wiley & Sons, Inc.

Products & Services
Fiber Optic Cables
Fiber optic cables are composed of one or more transparent optical fibers enclosed in protective coverings and strength members. Fiber optic cables are used to transmit "light" data.
Wavelength Division Multiplexers (WDM)
Wavelength division multiplexers (WDM) are devices that combine light signals with different wavelengths, coming from different fibers, onto a single fiber. They include dense wavelength division multiplexers (DWDM), devices that use optical (analog) multiplexing techniques to increase the carrying capacity of fiber networks beyond levels that can be accomplished via time division multiplexing (TDM).
Linear Guides and Rails
Linear guides and rails provide a smooth, precision, guiding surface on which the rolling element of a linear bearing rides.
Rotary Shafts
Rotary shafts are elongated, rod-shaped devices that rotate about a longitudinal axis and transmit torque. They are similar in shape to linear shafts, but are designed to withstand torsional forces.
Linear Shafts
Linear shafts are elongated, rod-shaped devices that provide linear or rotary motion for power transmission applications.

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