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Which thing is more dominant in making a fiber function as a bidirectional optical amplifier?

Which thing is more dominant in making a fiber function as a bidirectional optical amplifier? Correct Answer Pump source

Brillouin gain is always greater than Raman gain. It exists for light propagation in opposite direction to the pump source. Also Brillouin frequency shifts and gain bandwidth are much smaller than Raman. Raman amplification occurs for light propagating in either direction. Thus, pump source is more important in making a fiber function as bidirectional optical amplifier.

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