FOA CFOT Terms and Definitions A
thru Z Exam Questions Correct
Answers Current Update (A Pass)
What is a linear measure of optical power? - ✔✔Watts
What is the measure of the color of light, usually expressed in nanometeres (nm) or
microns (*m)? - ✔✔Wavelength
What do you call a technique of sending signals of several different wavelengths of light
into the fiber simultaneously? - ✔✔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? - ✔✔Working Margin
A device that couples visible light into the fiber to allow visual tracing and testing of
continuity. - ✔✔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. - ✔✔Vertical Cavity Surface Emitting Laser
(VCSEL)
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, A device which includes an LED or laser source and signal conditioning electronics that
is used to inject a signal into fiber. - ✔✔Transmitter
Confinement of light into the core of a fiber by the reflection off the core-cladding
boundary. - ✔✔Total internal reflection
A laser diode or LED used to inject an optical signal into fiber for testing loss of the fiber
or other components. - ✔✔Test source
A kit of fiber optic instruments, incl. power meter, source and test accessories (to
measure loss and power) - ✔✔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... - ✔✔Test cable
The preparation of the end of a fiber to allow connection to another fiber or active
device. - ✔✔Termination
A communication device that allows conversation over unused fibers. - ✔✔Talkset
LED that emits light perpendicular to the semiconductor chip. Most LEDs used in data
communications are this type. - ✔✔Surface emitter LED
This is a multimode fiber where the core is all the same index of refraction. - ✔✔Step
index fiber
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thru Z Exam Questions Correct
Answers Current Update (A Pass)
What is a linear measure of optical power? - ✔✔Watts
What is the measure of the color of light, usually expressed in nanometeres (nm) or
microns (*m)? - ✔✔Wavelength
What do you call a technique of sending signals of several different wavelengths of light
into the fiber simultaneously? - ✔✔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? - ✔✔Working Margin
A device that couples visible light into the fiber to allow visual tracing and testing of
continuity. - ✔✔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. - ✔✔Vertical Cavity Surface Emitting Laser
(VCSEL)
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, A device which includes an LED or laser source and signal conditioning electronics that
is used to inject a signal into fiber. - ✔✔Transmitter
Confinement of light into the core of a fiber by the reflection off the core-cladding
boundary. - ✔✔Total internal reflection
A laser diode or LED used to inject an optical signal into fiber for testing loss of the fiber
or other components. - ✔✔Test source
A kit of fiber optic instruments, incl. power meter, source and test accessories (to
measure loss and power) - ✔✔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... - ✔✔Test cable
The preparation of the end of a fiber to allow connection to another fiber or active
device. - ✔✔Termination
A communication device that allows conversation over unused fibers. - ✔✔Talkset
LED that emits light perpendicular to the semiconductor chip. Most LEDs used in data
communications are this type. - ✔✔Surface emitter LED
This is a multimode fiber where the core is all the same index of refraction. - ✔✔Step
index fiber
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