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FOA CFOT Terms and Definitions A thru Z Questions and Answers

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FOA CFOT Terms and Definitions A thru Z Questions and Answers What is a linear measure of optical power? - Answer-Watts What is the measure of the color of light, usually expressed in nanometeres (nm) or microns (*m)? - Answer-Wavelength What do you call a technique of sending signals of sever...

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FOA CFOT Terms and Definitions A thru
Z Questions and Answers

What is a linear measure of optical power? - Answer✔✔-Watts


What is the measure of the color of light, usually expressed in nanometeres (nm) or microns

(*m)? - Answer✔✔-Wavelength


What do you call a technique of sending signals of several different wavelengths of light into the

fiber simultaneously? - Answer✔✔-Wavelength Division Multiplexing (WDM)


The difference (in dB) between the power budget and the loss budget (i.e. the excess power

margin) is known as what? - Answer✔✔-Working Margin


A device that couples visible light into the fiber to allow visual tracing and testing of continuity. -

Answer✔✔-Visual Fault Locator (VFL)


A type of laser that emits light vertically out of the chip, not out of the edge, and is widely used

in fast multimode networks. - Answer✔✔-Vertical Cavity Surface Emitting Laser (VCSEL)


A device which includes an LED or laser source and signal conditioning electronics that is used

to inject a signal into fiber. - Answer✔✔-Transmitter


Confinement of light into the core of a fiber by the reflection off the core-cladding boundary. -

Answer✔✔-Total internal reflection

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A laser diode or LED used to inject an optical signal into fiber for testing loss of the fiber or

other components. - Answer✔✔-Test source


A kit of fiber optic instruments, incl. power meter, source and test accessories (to measure loss

and power) - Answer✔✔-Test kit


A short single fiber jumper cable with connectors on both ends. This cable must be made of

fiber and connectors of matching type... - Answer✔✔-Test cable


The preparation of the end of a fiber to allow connection to another fiber or active device. -

Answer✔✔-Termination


A communication device that allows conversation over unused fibers. - Answer✔✔-Talkset


LED that emits light perpendicular to the semiconductor chip. Most LEDs used in data

communications are this type. - Answer✔✔-Surface emitter LED


This is a multimode fiber where the core is all the same index of refraction. - Answer✔✔-Step

index fiber


Equilibrium modal distribution (EMD) in multimode fiber (achieved some distance from the

source) where the relative power in the modes becomes stable with increasing distance. -

Answer✔✔-Steady State Modal Distribution


The distribution of power among the output fibers of a coupler. - Answer✔✔-Splitting Ratio


A device that provides for a permanent connection between two fibers. - Answer✔✔-Splice

(fusion or mechanical)

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