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Exam contains 48 questions

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Question 1 🔥

Which of the following are the main reasons for fiber attenuation?

Which database solution meets these requirements?

A. Refraction and reflection

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B. Scattering and absorption

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C. Chromatic dispersion (CD) and polarization mode dispersion (PMD)

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D. Small channel spacing

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Discussion of the question

Question 2 🔥

What is the meaning of first, second, and third window in the optical fiber propagation context?

Which database solution meets these requirements?

A. These windows correspond to three different minimum and maximum optical power levels used for optical transmission.

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B. These windows are three different wavelength intervals where the WDM optical transmission occurs.

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C. These three windows are three different angles of incidence of the light injected by the laser into the fiber.

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D. Different optical transmission windows correspond to different safety requirements and rules for the related lasers operating with these windows.

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Discussion of the question

Question 3 🔥

In which window(s) does the attenuation reach its minimum peak?

Which database solution meets these requirements?

A. First window (850 nm)

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B. Second window (1300 nm)

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C. Third window (1550 nm)

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D. Both first and second windows

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Discussion of the question

Question 4 🔥

Which of the following statements is true about chromatic dispersion (CD)?

Which database solution meets these requirements?

A. Different channels have different bandwidth and this causes different CD performances.

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B. The fiber attenuation changes along the fiber, and when the light crosses these differences the CD takes place.

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C. Different wavelengths propagate at different speeds within the same media and therefore different colors travel in the fiber with different speed.

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D. The fiber attenuation introduces inter-channel interference.

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Discussion of the question

Question 5 🔥

How does a Raman pump work in the 1830 specific implementation?

Which database solution meets these requirements?

A. The amplification is done simultaneously for all channels as they enter the board.

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B. As the incoming signal power increase, the gain of the amplifier is reduced.

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C. The pump light travels in the same direction of the signal, amplifying it while it flows in the fiber towards the following node.

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D. The pump light travels in the opposite direction of the signal to be amplified, amplifying it while it arrives from the adjacent node.

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Discussion of the question

Question 6 🔥

What is the definition of OSNR?

Which database solution meets these requirements?

A. The OSNR is defined as the ratio between the transmitted optical power and the received optical power over 1 km of fiber, including both signal and optical noise.

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B. The OSNR is the ratio between the optical output signal power and the optical input signal power of the device being analyzed.

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C. The OSNR is defined as the ratio between the average optical signal power and the average optical noise power over a specific spectral bandwidth.

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D. The OSNR is defined as the ratio between the optical signal power (including noise) and the optical noise power over a specific spectral bandwidth.

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Discussion of the question

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Exam contains 48 questions

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