Optical Fiber Communications 4th Edition by Gerd Keiser

Exercise 3

Assume that a 32-channel DWDM system has uniform channel spacings of v = 100 GHz and let the frequency v n correspond to the wavelength n. Using this correspondence, let the wavelength 1 = 1550 nm. Calculate the wavelength spacing between the first two channels (between channels 1 and 2) and between the last two channels (between channels 31 and 32). From the result, what can be concluded about using an equal-wavelength spacing definition in this wavelength band instead of the standard equal-frequency channel spacing specification