OMA (Optical Modulation Amplitude) is a fundamental metric in optical digital links. It quantifies the usable optical swing between โ1โ and โ0โ states, and it ties directly into BER, receiver sensitivity, and overall link budget. This article. ER penalty = 2. 23 dB à decrease powers by 2. In optical communication systems, sensitivity is a measure of how weak an input signal can get before the bit-error ratio (BER) exceeds some specified number. The standards body governing the application sets this specified BER. It is given by where P1 is the optical power level generated when the light source is "on," and P0 is the power. In an optical transmission system, one essential parameter in determining the system power budget is the optical receiver sensitivity, which is defined as the minimum average optical power for a given bit error rate (BER).
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