Kleinstein, Mikery, Coppercone2, Capitandon hi guys I'm replying to you with this post because your answer concerns optical modulators, yes I had also thought about using Kerr cells and the pockels effect but I think the costs are high, what I would like to do is get 10 hz , but since they are too low in frequency, I would like to use infrared beams (LED or laser) to send them. the beats or the frequency modulation are 2 methods that I hypothesized that could work to extract the 10 Hz frequency from the infrared frequency, so I ask you is it possible to do it with the beats and modulation, or the infrared frequencies are too high? with frequency modulation, I could have a carrier with an infrared signal, and the modulating signal would have been the frequency of 10 Hz, could this be possible?