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Exam (elaborations)

Fiber Optics Exam Questions Marking Scheme New Update (A+ Pass)

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  • 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...

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  • September 19, 2024
  • 6
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • Fiber Optics
  • Fiber Optics
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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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