Which performance parameter is the minimum amount of optical power required to achieve a specific bit-error rate (BER) in digital systems or a given signal-to-noise ratio (SNR) in analog systems?

Which performance parameter is the minimum amount of  optical power required to achieve a specific bit-error rate (BER)  in digital systems or a given signal-to-noise ratio (SNR) in  analog systems?
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1 Answer

Answer :

Receiver sensitivity.
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