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PHOTO DETECTION
Photodetection of the light field represents the key operation in the optical receiver, converting the collected field to a current or voltage waveform for subsequent postdetection processing. This interfacing of the optics and the electronics represents an area commonly referred to as photonics. For optimal design of the photonic processing, it is important that the system designer be cognizant of the characteristics of the photodetecting operation. This becomes particularly significant when the actual statistics of the detector waveform are necessary for optimal design procedures. This occurs in detection and decoding systems where performance depends explicitly on the mathematical model of the photodetector.
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