1雪崩光电二极管（APD）探测器2nThe Multiplication ProcessnAvalanche Photodiode DesignsnAvalanche Photodiode BandwidthnAvalanche Photodiode NoiseAvalanche Photodiode Detectors3456789Measured values of ionisation coefficients e and h for some common semiconductor materials, plotted versus (1/E).The Multiplication Process10The Multiplication Processn We may define ionisation coefficients for electrons and holes, e and h respectively, as the probability that a given carrier will excite an electron-hole pair in u
