| http://www.w3.org/ns/prov#value | - ng (a) first means that comprise(i) test current generating means that are conductively connected to the laser source such that the laser current comprises a test current comprising at least a first nonsinusoidal component having a frequency f1 that is substantially lower than the signal frequency, with the laser voltage comprising a test current-caused component; and (ii) means, responsive to the
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