Keywords: noise BER, LOP, loss of power, BER, setting LOP, bit error rate, threshold level, photodiode, receiver, assert level, extinction ratio, optical input sensitivity, responsivity, preamplifier, preamp, transimpedance gain, limiting amplifier, photo diod
APPLICATION NOTE 460
HFAN-03.0.1: Setting a LOP (Loss of Power) Threshold Level Equivalent to a BER Level of 10-3
Nov 01, 2000
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:
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.
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APPLICATION NOTE 460: HFAN-03.0.1: Setting a LOP (Loss of Power) Threshold Level Equivalent to a BER Level of 10-3