APPLICATION NOTE 460

HFAN-03.0.1: Setting a LOP (Loss of Power) Threshold Level Equivalent to a BER Level of 10-3


Abstract: The following example outlines how one might set the LOP threshold in a photodiode receiver such that the assert level is equivalent to a bit error rate (BER) of 10-3. The assumptions are as follows:
  1. The extinction ratio (re) = 10
  2. The optical input sensitivity is -31dBm.
  3. A typical PIN responsivity (p) = 0.85A/W.
  4. A typical preamplifier transimpedance gain = 6kΩ.
  5. Noise-limited input sensitivity.


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APP 460:
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