ETA Fiber Optics Certification
Light is electromagnetic energy with a _________ frequency and a ________ wavelength compared to
radio waves. correct answersHigher, Shorter
What type of light is used in Fiber Optic Transmissions correct answersInfrared or IR
What are the four items needed for a Fiber Optic System to work? correct answersTransmitter, Fiber
Cable, Receiver, Connectors
1mW is the same as what in dBM? correct answers0 or absolute power
How is power measured in fiber? correct answersmW or dBM
Propagation correct answerslight 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 correct answersHorizontal distance between the crests or between the troughs of two
adjacent waves
Frequency correct answersthe number of complete wavelengths that pass a point in a given time
What fiber optic wavelength has the lowest loss? correct answers1550 um
What wavelength windows are used for most communications? correct answers850, 1330, 1550
What year was the first fiber optic cable used in the communication telephone system? correct
answers1977
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What light source is used for single mode? correct answersLaser Diode LD
What two light sources are used with multimode? correct answersLight Emitting Diode (LED)
Vertical Cavity Surface Emitting Laser (VCSEL)
All wavelengths of light travel at the same speed. True or False correct answersFalse
Which type of fiber has the largest core size? correct answersMulti-mode
What is OSHA responsible for? correct answersthe identification of various hazards present in the
workplace and for the creation of rules and regulations to minimize exposure to such hazards
What are two ways to reduce modal dispersion? correct answersSmaller Core and use graded index fiber
What happens to the wavelength in optical fiber when the number of modes increases? correct
answersGets shorter
decreases
When does Fresnel reflection occur correct answersA small portion of the incident light is reflected back
into the source fiber at the fiber interface.
What is it called when light bends when moving between water and air? correct answersRefraction
What is the refractive index of the core and cladding of optical fiber correct answers1.42 and 1.457
Single Mode usually operates at what three wavelengths? correct answers1310
1550
1625
What two multi-mode wavelengths are most commonly used? correct answers850Powered by TCPDF (www.tcpdf.org)
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Light is electromagnetic energy with a _________ frequency and a ________ wavelength compared to
radio waves. correct answersHigher, Shorter
What type of light is used in Fiber Optic Transmissions correct answersInfrared or IR
What are the four items needed for a Fiber Optic System to work? correct answersTransmitter, Fiber
Cable, Receiver, Connectors
1mW is the same as what in dBM? correct answers0 or absolute power
How is power measured in fiber? correct answersmW or dBM
Propagation correct answerslight 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 correct answersHorizontal distance between the crests or between the troughs of two
adjacent waves
Frequency correct answersthe number of complete wavelengths that pass a point in a given time
What fiber optic wavelength has the lowest loss? correct answers1550 um
What wavelength windows are used for most communications? correct answers850, 1330, 1550
What year was the first fiber optic cable used in the communication telephone system? correct
answers1977
1 / 2
What light source is used for single mode? correct answersLaser Diode LD
What two light sources are used with multimode? correct answersLight Emitting Diode (LED)
Vertical Cavity Surface Emitting Laser (VCSEL)
All wavelengths of light travel at the same speed. True or False correct answersFalse
Which type of fiber has the largest core size? correct answersMulti-mode
What is OSHA responsible for? correct answersthe identification of various hazards present in the
workplace and for the creation of rules and regulations to minimize exposure to such hazards
What are two ways to reduce modal dispersion? correct answersSmaller Core and use graded index fiber
What happens to the wavelength in optical fiber when the number of modes increases? correct
answersGets shorter
decreases
When does Fresnel reflection occur correct answersA small portion of the incident light is reflected back
into the source fiber at the fiber interface.
What is it called when light bends when moving between water and air? correct answersRefraction
What is the refractive index of the core and cladding of optical fiber correct answers1.42 and 1.457
Single Mode usually operates at what three wavelengths? correct answers1310
1550
1625
What two multi-mode wavelengths are most commonly used? correct answers850Powered by TCPDF (www.tcpdf.org)
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