Receiver Design for Digital Fiber Optic Communication Systems, II

This paper will apply the theory of Part I to illustrate in detail how the required received optical power in a digital fiber optic repeater varies with the parameters such as the desired error rate, the thermal noise sources, the bit rate, detector dark current, imperfect modulation, etc. We shall begin by first applying the formulas of Part I to a specific realistic example to obtain reference point. We shall then derive curves of how the required power varies around this point as we vary the system parameters.