Question

The transimpedance amplifier is used. The responsivity of the APD (x=1.0) with a junction capacitance of 10 pF, is 0.7 A/W, the dark current is negligible, and the noise figure is 3 dB. Assume the temperature is 300 K. Determine the optimum avalanche multiplication factor for the diode.
a) Calculate the shot noise limited current for the detector (Assume dark current is small and T = 300 K).
b) The responsivity of the detector is 0.7 A/W. Calculate the received optical power for the detector.

Answer 1