After taking the test, you may print your answers for reference or to turn in as
homework.
True/False
Indicate whether the statement is true
or false.
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1.
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Fiber optic links generally use two fibers for full duplex (bidirectional)
links.
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2.
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LEDs have higher output power and bandwidth than lasers.
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Multiple Choice
Identify the choice that best
completes the statement or answers the question.
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3.
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Singlemode fiber systems covering long distances and using DWDM use __________ sources.
A. | F-P laser | B. | DFB laser | C. | VCSEL | D. | LED |
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4.
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Wavelength division multiplexing uses __________ to
transmit multiple signals on a single fiber.
A. | The ability of fiber to transmit multiple wavelengths without
mixing | B. | F-P Lasers | C. | The wide spectral width of
lasers | D. | The high fiber bandwidth |
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5.
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Coarse wavelength division multiplexing (CWDM) systems require __________ to allow transmitting in the E-Band (1260-1360 nm).
A. | Low water peak fiber | B. | DFB lasers | C. | 1490 nm pump
lasers |
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6.
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Long wavelength singlemode links at wavelengths in the range of 1300-1650
nm links must use __________ detectors in the receiver for the best
sensitivity performance.
A. | Silicon | B. | Germanium | C. | InGaAs |
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7.
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Fiber amplifiers used in DWDM systems work in the __________ wavelength range.
A. | 650-850 | B. | 850-1300 | C. | 1300-1550 | D. | 1480-1650 |
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Multiple Response
Identify one or more choices
that best complete the statement or answer the question.
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8.
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Singlemode transceivers use __________ sources for
their higher coupled power and bandwidth.
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9.
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Multimode transceivers use __________ sources
depending on their requirements for coupled power and bandwidth.
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