Current transducer with offset cancellation

A system, for use with a fiber-optic current transducer (FOCT), the system comprising:

• a processing unit configured to:
• convert a first light signal into a first electrical signal;
• convert a second light signal into a second electrical signal;
• calculate a first direct current (DC) offset of the first electrical signal;
• calculate a second direct current (DC) offset of the second electrical signal;
• calculate a difference value by subtracting the first DC offset of the first electrical signal from the second DC offset of the second electrical signal;
• calculate, based on the difference value, a first gain for the first electrical signal and a second gain for the second electrical signal;
• calculate a first adjusted DC offset by multiplying the first DC offset by the first gain;
• calculate a second adjusted DC offset by multiplying the second DC offset by the second gain;
• wherein the first gain and the second gain are determined such that the first adjusted DC offset is equal to the second adjusted DC offset;
• calculate a first adjusted electrical signal by multiplying the first electrical signal by the by the first gain;
• and
• calculate a second adjusted electrical signal by multiplying the second electrical signal by the second gain.