Comment Polarization along fibers (Score 2) 27
In normal fiber optical communications, both linear polarizations are used to transmit data (see the openZR+ standard). Rather than trying to control the polarization as the light travels down a fiber, they arbitrarily measure two polarizations at the receiver, then digitally do a linear combination of the two signals in whatever proportion makes the result the most orthogonal. So itâ(TM)s not a surprise that fiber technology does not have well controlled polarization.