FOA CFOT Terms and Definitions A
thru Z Exam Questions and Answers
100% Pass
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.
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, 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.
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thru Z Exam Questions and Answers
100% Pass
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.
100% Pass Guarantee Emilly Charlotte, All Rights Reserved © 2025 1
, 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.
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