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QUESTION 50
If the power is 0 dBm, what is the power in mW?
A. 0 mW
B. 1 mW
C. 10 mW
D. 1.5 mW

Correct Answer: B Section: (none) Explanation
Explanation/Reference:
QUESTION 51
Drag Drop question A.

B.
C.
D.

Correct Answer: Section: (none) Explanation
Explanation/Reference:
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QUESTION 52
For lasers with tightly controlled wavelengths, approximately how far apart are the centers of adjacent wavelengths when 100 GHz spacing is used in a DWDM system?
A. 0.4 nanometers
B. 0.6 nanometers
C. 0.8 nanometers
D. 1.2 nanometers
E. 1.6 nanometers

Correct Answer: C Section: (none) Explanation
Explanation/Reference:
QUESTION 53
How is a Thin Film filter fabricated?
A. The glass core is doped with an Erbium in periodic segments of the fiber.
B. Layers of high index ?and low index ?material are deposited on a glass substrate.
C. Thin layers of silica glass are placed onto wafers to produce a prism-like effect.
D. Fiber is etched with an ultraviolet laser that is precisely spaced for specific wavelength filtering.

Correct Answer: B Section: (none) Explanation
Explanation/Reference:
QUESTION 54
Click the Exhibit button. When designing a DWDM system with multiple amplified spans, a pre-amp is needed at Site B to _____. (Choose three.)

A. offset the OADM loss at site B
B. overcome the high multiplexer loss at site A
C. amplify signal levels after the high loss through Fiber Span 1
D. adjust add channels at site B to be at the same level as the passthrough channels
E. ensure that the per channel power is higher than the minimum needed for the post-amp at Site B

Correct Answer: ACE Section: (none) Explanation
Explanation/Reference:
QUESTION 55
What are three factors that limit the maximum distance of an amplified optical signal without regeneration? (Choose three.)
A. fiber dispersion
B. signal attenuation
C. transmitter power
D. amplifier bandwidth
E. receiver dispersion tolerance

Correct Answer: ABE Section: (none) Explanation
Explanation/Reference:
QUESTION 56
If the dispersion of a given fiber is 17ps/nm*km at 1550 nm and zero at 1310 nm, then what is the accumulated dispersion of an ITU wavelength after it travels 200 km?
A. 0 ps/nm
B. 340 ps/nm
C. 200 ps/nm
D. 3400 ps/nm
E. More information is needed.

Correct Answer: D Section: (none) Explanation
Explanation/Reference:
QUESTION 57
The dispersion of a non-zero dispersion shifted fiber is 6 ps/nm*km at 1550 nm and 10 ps/nm*km at 1610 nm. What is the minimum dispersion compensation required if an L-Band DWDM signal travels through 200 km of fiber and has a dispersion tolerance of 1800 ps/nm?
A. none
B. -600 ps/nm
C. -200 ps/nm
D. +200 ps/nm
E. +600 ps/nm

Correct Answer: C Section: (none) Explanation
Explanation/Reference:
QUESTION 58
Click the Exhibit button. Which type of multiplexer is shown in the exhibit?

A. Thin Film filter
B. Fiber Bragg Grating
C. Arrayed Wave Guide
D. Erbium fiber amplifier

Correct Answer: C Section: (none) Explanation Explanation/Reference:
QUESTION 59
In the OSNR model for EDFA amplifiers, SNR OUT = 1/(1/SNR IN + FhvB/P IN ), what does SNR IN represent?
A. the signal to noise of the current optical amplifier
B. the signal to noise of the previous amplifier or source
C. the signal to noise introduced by the optical multiplexer
D. the accumulated noise to signal ratio of the optical channel

Correct Answer: B Section: (none) Explanation
Explanation/Reference:

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