Thanks alot. well i am planning to do Homodyne detection. in this method, the photocurrets from two photodiodes need to be subtracted. there might be different ways to do this, the one that i want to do is to first measure both the currents using lock in. then feeding the ouput from lock into...
i want to subtract photocurrents from two photodiodes. please tell me how to do this. also please tell me how to measure current and voltage with a lock in amplifier.
Thank you very much