Ka honoa te ngaohiko ki te karaihe electro-optic, ka huri te taupae whakaata me etahi atu mea whatu o te huringa karaihe, ka huri i te ahua polarization o te ngaru marama, kia huri te marama polarized porohita hei marama polarized elliptically, a ka riro te marama polarized rārangi i roto i te polarizer, a ka modulated te kaha marama. I tenei wa, kei roto i te ngaru marama nga korero oro, ka horahia ki te waahi waatea. Ka whakamahia te kaitirotiro whakaahua ki te tango i te tohu tohu whakahurihuri i te waahi whiwhi, katahi ka mahia te huringa ara iahiko ki te huri i te tohu whatu ki te tohu hiko. Ka whakahokia mai te tohu oro e te demodulator, ka mutu ka oti te tuku whatu o te tohu tangi. Ko te ngaohiko tono ko te tohu oro tuku, ka taea te whakaputa mai i te kaiwhakamahara reo irirangi, i te puku riipene ranei, a, he tohu ngaohiko e rereke ana i te waa.