Fiber Optics Exam Questions Marking Scheme New Update (A+ Pass)
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Course
Fiber Optics
Institution
Fiber Optics
Fiber Optics Exam Questions Marking Scheme New Update (A+ Pass)
What type of light is used in fiber optic transmission? - Answers -Infrared
What are the 4 items are needed for a fiber optic system to work? - Answers -Transmitter
Fiber cable
Receiver
Connectors
1 mw is the same as what i...
Fiber Optics Exam Questions Marking
Scheme New Update (A+ Pass)
What type of light is used in fiber optic transmission? - Answers -Infrared
What are the 4 items are needed for a fiber optic system to work? - Answers -
Transmitter
Fiber cable
Receiver
Connectors
1 mw is the same as what in dBm? - Answers -0 dBm
How is power measured in fiber optics? - Answers -dBm
What fiber optic wavelength has the lowest loss? - Answers -1550
What wavelengths windows are used most for communications in optical fibers? -
Answers -850nm
1300nm
1550nm
What year was fiber optic cable first used in commercial telephone systems in the U.S.?
- Answers -1977
What light source is used for single mode fiber? - Answers -Laser diode
What two light sources are used with multimode fiber? - Answers -LED and VCSEL
All wavelengths of light travel at the same speed?
True or false - Answers -False
Which type of fiber has the larger core size? Single mode or multimode - Answers -
Multimode
What is OSHA responsible for? - Answers -To enforce safety precautions
What are the two ways to reduce modal dispersion? - Answers -Use graded index fiber.
Shrink the core size.
What happens to the wavelength in optical fiber when the number of modes increase? -
Answers -The wavelength gets shorter
Where does fresnel reflection occur? - Answers -At the air gap
, Inter mechanical connection
What is it called when light bends when moving between water and air? - Answers -
refraction
What is the refractive index of the core and cladding of MM optical fiber? - Answers -
1.42 is for cladding
1.457 is for the core
Single mode systems usually operate at what three wavelengths? - Answers -1310nm
1550nm
1625nm
What two multimode wavelengths are the most commonly used? - Answers -850nm
1300nm
How is attenuation measured? - Answers -Decibels (dB)
What is a "mode" in optical fiber? - Answers -A path that light can travel through
What will happen to tensil strength of a fiber cable if it is bent more than recommended?
- Answers -Macrobend
The tensil strength decreases
OM3 and OM4 multimode fibers are known as what type of fiber? - Answers -Laser
optimized
What are the two most common core and cladding sizes in multimode optical fiber? -
Answers -50/125nm and 62.5nm
The buffer diameter for fiber used in tight buffered cables is what? - Answers -900nm
What jacket color does single mode fiber have? - Answers -Yellow
Twelve colors comprise the fiber color code. What are they in order? - Answers -Blue
Orange
Green
Brown
Slate
White
Red
Black
Yellow
Violet
Rose
Aqua
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