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FOA CFOT Terms and Definitions A thru Z exam 2023/ 99 Question and Answers/Verified.
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FOA CFOT Terms and Definitions A thru Z exam 2023/ 99 Question and Answers/Verified.
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FOA CFOT Terms and Definitions A thru Zexam 2023/ 99 Question and
Answers/Verified.
Watts - -What is a linear measure of optical power?
-Wavelength - -What is the measure of the color of light, usually expressed in
nanometeres (nm) or microns (*m)?
-Wavelength Division Multiplexing (WDM) - -What do you call a technique of sending
signals of several different wavelengths of light into the fiber simultaneously?
-Working Margin - -The difference (in dB) between the power budget and the loss
budget (i.e. the excess power margin) is known as what?
-Visual Fault Locator (VFL) - -A device that couples visible light into the fiber to allow
visual tracing and testing of continuity.
-Vertical Cavity Surface Emitting Laser (VCSEL) - -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.
-Transmitter - -A device which includes an LED or laser source and signal conditioning
electronics that is used to inject a signal into fiber.
-Total internal reflection - -Confinement of light into the core of a fiber by the
reflection off the core-cladding boundary.
-Test source - -A laser diode or LED used to inject an optical signal into fiber for testing
loss of the fiber or other components.
, -Test kit - -A kit of fiber optic instruments, incl. power meter, source and test
accessories (to measure loss and power)
-Test cable - -A short single fiber jumper cable with connectors on both ends. This
cable must be made of fiber and connectors of matching type...
-Termination - -The preparation of the end of a fiber to allow connection to another
fiber or active device.
-Talkset - -A communication device that allows conversation over unused fibers.
-Surface emitter LED - -LED that emits light perpendicular to the semiconductor chip.
Most LEDs used in data communications are this type.
-Step index fiber - -This is a multimode fiber where the core is all the same index of
refraction.
-Steady State Modal Distribution - -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.
-Splitting Ratio - -The distribution of power among the output fibers of a coupler.
-Splice (fusion or mechanical) - -A device that provides for a permanent connection
between two fibers.
-Source - -A laser diode or LED used to inject an optical signal into fiber
-Singlemode Fiber - -A fiber with small core that allows only one mode of light to
propagate. Commonly used with laser sources for high speed, long distance links.
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