FOA CFOT Terms and Definitions A thru Z Actual Exam Questions with All Correct Answers Updated (Graded A+)
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FOA CFOT Terms and Definitions A thru Z
Institution
FOA CFOT Terms And Definitions A Thru Z
FOA CFOT Terms and Definitions A thru Z Actual Exam Questions with All Correct Answers Updated (Graded A+)
Device that clamps onto a fiber and couples light from the fiber by bending, identifying the fiber (amongst others in a bundle, for example) by detecting high speed traffic of an operating...
FOA CFOT Terms and Definitions A thru
Z Actual Exam Questions with All
Correct Answers Updated 2024-2025
(Graded A+)
Device that clamps onto a fiber and couples light from the fiber by bending, identifying
the fiber (amongst others in a bundle, for example) by detecting high speed traffic of an
operating link or 2kHz tone injected by a test source. - Answer- Fiber Identifier
An instrument that couples visible light into the fiber to allow visual checking of
continuity and tracing for correct connections. - Answer- Fiber Tracer
Precision tube which holds a fiber for alignment for interconnection. Typically made from
ceramics and is white in color. - Answer- Ferrule
Uses erbium or other doped fibers and pump lasers to increase signal output power
without electronic conversion. - Answer- Fiber Amplifier
Amount of light lost in a coupler, beyond what is typical in the splitting to multiple output
fibers. - Answer- Excess Loss
IBM standard for connecting peripherals to a computer over fiber optics. - Answer-
ESCON
Steady state modal distribution in multimode fiber, achieved some distance from the
source, where the relative power in the modes becomes stable with increasing distance.
- Answer- Equilibrium Modal Distribution (EMD)
Quality of the end surface of a fiber prepared for splicing or terminated in a connector. -
Answer- End Finish
An LED that emits from the edge of the semiconductor chip, producing higher power
and narrower spectral width. - Answer- Edge-emitting Diode (E-LED)
Temporal spreading of a pulse in an optical waveguide. May be caused by modal or
chromatic effects. - Answer- Dispersion
Used for high speed and long distance transmitters. - Answer- Distributed Feedback
Laser (DFB)
, Photodiode that converts optical signals into electrical signals. - Answer- Detector
Unit of measurement of optical power which indicates relative power on a logarithmic
scale. dB = 10 log - Answer- Decibel (dB)
Optical power referenced to 1 miliwatt. - Answer- dBm
Use of lasers spaced widely over the range of 1260nm to 1670 nm. - Answer- Coarse
Wavelength Division Multiplexing (CWDM)
The wavelength beyond which singlemode fiber only supports one mode of propagation
is called a what? - Answer- Cutoff Wavelength
Technique for measuring loss of bare fiber by comparing the sources initial coupled
power to the power measured at the end of a long length of fiber. - Answer- Cutback
Method
Device that splits or combines light from more than one fiber. - Answer- Coupler
The center of the optical fiber through which light is transmitted. - Answer- Core
A device that provides for a demountable connection between two fibers (or fiber and
active device). Also provides protection for the fiber. - Answer- Connector
Lower fractive index optical coating over the core of fiber that "traps" light into the core. -
Answer- Cladding
Temporal spreading of a pulse in an optical waveguide caused by the wavelength
dependence of the velocities of light. - Answer- Chromatic Dispersion
A protective coating applied directly on the fiber. - Answer- Buffer
An electrical or optical pulse that carries information. - Answer- Bit
Fraction of data bits transmitted that are received in error. - Answer- Bit-Error Rate
(BER)
Loss in fiber caused by stress on the fiber bet around a restrictive radius. - Answer-
Bending Loss / Microbending Loss
Range of signal frequencies or bit rate within which a fiber optic component, link or
network will operate. The maximum speed that data can be transmitted over the link. -
Answer- Bandwidth
What is a linear measure of optical power? - Answer- Watts
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