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
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
