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Gender Studies homework help

A lightwave communication link, operating at a wavelength of 1.5 ?m and a bit rate of 1Gb/s has a receiver consisting of a cascaded optical amplifier, narrow optical filter, and photodetector. It ideally takes at least 130 photons/bit to achieve 10?15 bit error rate.(a) How many photons per bit would it take to achieve the same error rate at 10 Gb/s?(b) At this wavelength 1 mW of power is carried by 7.5×1015 photons per second. What is the received power level for 10?15 bit error rate at 1 Gb/s? (Express the answer in dBm).


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