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:
- The extinction ratio (re) = 10
- The optical input sensitivity is -31dBm.
- A typical PIN responsivity (p) = 0.85A/W.
- A typical preamplifier transimpedance gain = 6kΩ.
- Noise-limited input sensitivity.