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Problem 2.4 (37.5 points) (Si pin photodiodes) A Si pin photodiode has the following characteristics and responsivity: Responsivity (A/W) 0.6 0.5 Wavelength Active area Rise Junction Dark NEP 0.4 range diameter time capacitance current [W Hz¹/2] [nm] [mm] [ps] [pF] 0.3 [PA] 400 - 1100 1.25 300 24 40 9 x 10-14 0.2 The reverse operation voltage for the photodiode is 100 V 0.1 0 200 400 600 800 1000 1200 Wavelength(nm)
(f) Calculate the minimum light intensity for the three wavelengths that would produce a photocurrent signal at least equal with the dark current. (g) This detector is used across the specified wavelength range to detect signals with a bandwidth of 100 MHz. What is the minimum power required for a SNR equal with at least 1?