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For a given optical fiber communication system, P(e) = 10-9, Zm = 20.7, f = 2.9×1014, η = 1. Find the minimum pulse energy or quantum limit.

For a given optical fiber communication system, P(e) = 10-9, Zm = 20.7, f = 2.9×1014, η = 1. Find the minimum pulse energy or quantum limit. Correct Answer 3.9×10-18

The minimum pulse energy or quantum limit is given by – Emin = Zmhf/η Where, Zm = Number of photons h = Planck’s constant f = frequency η = Quantum efficiency.

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