R. Beausoleil, M. Fiorentino, Zhihong Huang, D. Liang, W. Sorin, Binhao Wang, Xiaoge Zeng
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A Compact Circuit Model for Si-Ge Avalanche Photodiodes over a Wide Range of Gain
A Si-Ge avalanche photodiode circuit model is demonstrated, which includes carrier transit time, avalanche buildup time, and electrical parasitics. Electrical and optical dynamics are accurately captured over a wide range of gain. Excellent matching between simulated and measured 50 Gb/s PAM4 eye diagrams is achieved.