Nokia Certified Network Professional – IP/MPLS Services — Question 26

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

Answer options

• A. The amplification is done simultaneously for all channels as they enter the board.
• B. As the incoming signal power increase, the gain of the amplifier is reduced.
• C. The pump light travels in the same direction of the signal, amplifying it while it flows in the fiber towards the following node.
• D. The pump light travels in the opposite direction of the signal to be amplified, amplifying it while it arrives from the adjacent node.

Correct answer: D

Explanation

The correct answer is D because in a Raman pump, the pump light indeed travels opposite to the signal direction, allowing for effective amplification as the signal arrives from the adjacent node. Option A is incorrect as it describes simultaneous amplification for all channels, which does not specifically relate to the operation of a Raman pump. Option B is misleading as an increase in signal power typically leads to increased gain rather than a reduction. Option C incorrectly states the direction of the pump light, which is crucial for the amplification process.