FIBER OPTIC STUDY GUIDE FINAL| QUESTIONS
AND ANSWERS | 100% CORRECT BOOSTER.
Higher and Shorter Light is electromagnetic energy with a _______ frequency and a _______
wavelength compared to radios
Infrared (IR) What type of light is used in Fiber Optic transmissions?
Transmitter
Fiber Optic Cable
Receiver
Connector What are the 4 items needed for a fiber optic system to work?
0 dBM 1 mW is the same as what in dBM?
dBM How is the power measured in Fiber optics?
1550 nm What fiber optic wavelength has the lowest loss?
1300, 1550, 850 What wavelengths windows are used most for communication in optical
fibers?
1977 What year was fiber optic cable first used in commercial telephone systems in the U.S.?
Laser-diode What light source is used for single mode fiber?
LED and VCSEL What two light sources are used with multimode fiber?
False, Different wavelengths of light travel at different velocities All wavelengths of light
travel at the same speed. True o False. Why?
Multimode Which type of fiber has the larger core size? Single mode or multimode?
OSHA is responsible for enforcing it's standards on regulated entities What is OSHA
responsible for?
1. USE A SMALLER CORE
2. Use Graded-index Fiber What are two ways to reduce modal dispersion?
The Wavelength gets Shorter with more Modes. What happens to the wavelength in optical
fiber when the number of modes increase?
Air gaps and Mechanical Interconnections Where does Fresnel reflection occur?
, Refraction What is it called when light bends when moving between water and air?
Core 1.457 and 1.471
Cladding 1.42 What is the refractive index of the core and cladding of optical fiber?
1310, 1550, 1625 Single-mode systems usually operate at what three wavelengths?
850 and 1300 What two multimode wavelengths are the most commonly used?
Decibels (dB) How is attenuation measured?
A light path. What is a "mode" in optical fiber?
Decreases tensile strength What will happen to the tensile strength of a fiber cable if it is bent
more than recommended?
Laser-optimized multimode OM3 and OM4 multimode fibers are known as what type of fiber?
62.5/125ųm(US)
50/125ųm(EU) What are the two most common core and cladding sizes in multimode
optical fiber?
900um The buffer size for a fiber used in tight-buffered cables is what?
Yellow What jacket color does Single-mode fiber have?
1. Blue 2. Orange 3. Green 4. Brown 5. Slate 6. White 7. Red 8. Black 9. Yellow 10. Violet 11.
Rose 12. Aqua Twelve colors comprise the fiber color code. What are they in order?
Legacy multimode OM1 and OM2 are known as what types of fibers?
Reduce model dispersion Why does graded index fiber use numerous concentric layers of
glass?
Ferrule connector What is the optical fiber's cladding bonded to during the assembly
process?
Plenum A fiber optic cable that is "fire retardant and low smoke" is called what according
to the NEC?
Laser-optimized multimode What type of fiber has an aqua jacket?
Protects from moisture in outside environments What does the gel in a loose tube fiber optic
cable protect the optical fiber from if the jacket fails?
AND ANSWERS | 100% CORRECT BOOSTER.
Higher and Shorter Light is electromagnetic energy with a _______ frequency and a _______
wavelength compared to radios
Infrared (IR) What type of light is used in Fiber Optic transmissions?
Transmitter
Fiber Optic Cable
Receiver
Connector What are the 4 items needed for a fiber optic system to work?
0 dBM 1 mW is the same as what in dBM?
dBM How is the power measured in Fiber optics?
1550 nm What fiber optic wavelength has the lowest loss?
1300, 1550, 850 What wavelengths windows are used most for communication in optical
fibers?
1977 What year was fiber optic cable first used in commercial telephone systems in the U.S.?
Laser-diode What light source is used for single mode fiber?
LED and VCSEL What two light sources are used with multimode fiber?
False, Different wavelengths of light travel at different velocities All wavelengths of light
travel at the same speed. True o False. Why?
Multimode Which type of fiber has the larger core size? Single mode or multimode?
OSHA is responsible for enforcing it's standards on regulated entities What is OSHA
responsible for?
1. USE A SMALLER CORE
2. Use Graded-index Fiber What are two ways to reduce modal dispersion?
The Wavelength gets Shorter with more Modes. What happens to the wavelength in optical
fiber when the number of modes increase?
Air gaps and Mechanical Interconnections Where does Fresnel reflection occur?
, Refraction What is it called when light bends when moving between water and air?
Core 1.457 and 1.471
Cladding 1.42 What is the refractive index of the core and cladding of optical fiber?
1310, 1550, 1625 Single-mode systems usually operate at what three wavelengths?
850 and 1300 What two multimode wavelengths are the most commonly used?
Decibels (dB) How is attenuation measured?
A light path. What is a "mode" in optical fiber?
Decreases tensile strength What will happen to the tensile strength of a fiber cable if it is bent
more than recommended?
Laser-optimized multimode OM3 and OM4 multimode fibers are known as what type of fiber?
62.5/125ųm(US)
50/125ųm(EU) What are the two most common core and cladding sizes in multimode
optical fiber?
900um The buffer size for a fiber used in tight-buffered cables is what?
Yellow What jacket color does Single-mode fiber have?
1. Blue 2. Orange 3. Green 4. Brown 5. Slate 6. White 7. Red 8. Black 9. Yellow 10. Violet 11.
Rose 12. Aqua Twelve colors comprise the fiber color code. What are they in order?
Legacy multimode OM1 and OM2 are known as what types of fibers?
Reduce model dispersion Why does graded index fiber use numerous concentric layers of
glass?
Ferrule connector What is the optical fiber's cladding bonded to during the assembly
process?
Plenum A fiber optic cable that is "fire retardant and low smoke" is called what according
to the NEC?
Laser-optimized multimode What type of fiber has an aqua jacket?
Protects from moisture in outside environments What does the gel in a loose tube fiber optic
cable protect the optical fiber from if the jacket fails?
