Optical Communication Networks
Question Description
(b) A high impedance integrating front end preamplifier is used in an optical fibre receiver operating at awavelength of 1.55µm in parallel with a detector bias resistor of 200kΩ. The effective input resistanceof the preamplifier is 0.5MΩ and the total capacitance is 3pF. Calculate the bandwidth and thermalnoise (per unit bandwidth) of this receiver. State any assumptions made.
(c) Assuming Gaussian statistics for the noise, evaluate the sensitivity the receiver in Q1(b) at an errorrate of 10-9. State any assumptions made.
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