Optical Fiber Communications 4th Edition by Gerd Keiser

Exercise 3

Consider the absorption coefficient of silicon as a function of wavelength, as shown in Fig. 6.18. Ignoring reflections at the photodiode surface, plot the following two parameters over the wavelength range 600-1000 nm:
( a ) The quantum efficiency for depletion layer widths of 1, 5, 10, 20, and 50 m.
( b ) The responsivity for a silicon pin photodiode having a 20- m thick depletion layer.