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Exam (elaborations)

ETA Fiber Optics Certification CORRECT 100%

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  • FOA CFOA
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  • FOA CFOA

Light is electromagnetic energy with a _________ frequency and a ________ wavelength compared to radio waves. - ANSWER Higher, Shorter What type of light is used in Fiber Optic Transmissions - ANSWER Infrared or IR What are the four items needed for a Fiber Optic System to work? - ANSWER Tran...

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  • September 18, 2024
  • 9
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • FOA CFOA
  • FOA CFOA
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shantelleG
ETA Fiber Optics Certification CORRECT
100%
Light is electromagnetic energy with a _________ frequency and a ________ wavelength compared to
radio waves. - ANSWER Higher, Shorter



What type of light is used in Fiber Optic Transmissions - ANSWER Infrared or IR



What are the four items needed for a Fiber Optic System to work? - ANSWER Transmitter, Fiber Cable,
Receiver, Connectors



1mW is the same as what in dBM? - ANSWER 0 or absolute power



How is power measured in fiber? - ANSWER mW or dBM



Propagation - ANSWER light is reflected off a body and is return to its original emission point, the law of
propagation for the return trip is the original trip.



wavelength - ANSWER Horizontal distance between the crests or between the troughs of two adjacent
waves



Frequency - ANSWER the number of complete wavelengths that pass a point in a given time



What fiber optic wavelength has the lowest loss? - ANSWER 1550 um



What wavelength windows are used for most communications? - ANSWER 850, 1330, 1550



What year was the first fiber optic cable used in the communication telephone system? - ANSWER 1977

, What light source is used for single mode? - ANSWER Laser Diode LD



What two light sources are used with multimode? - ANSWER Light Emitting Diode (LED)

Vertical Cavity Surface Emitting Laser (VCSEL)

What is a mode in optical fiber? - ANSWER A light path through a fiber. (multi-mode and single-mode)



What will happen to the tensile strength of a fiber cable if it is bent more than recommended? -
ANSWER it will decrease or break



What are the two most common types of core and cladding in multi-mode fibers? - ANSWER 62.5/125

50/125



The buffer diameter for a fiber used in tight-buffered cables is what? - ANSWER 900 um



What jacket color does single-mode fiber have? - ANSWER yellow



Twelve colors comprise the fiber color code. What are they in order? - ANSWER Blue

Orange

Green

Brown

Slate

White

Red

Black

Yellow

Violet

Rose

Aqua

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