There are niche applications, called "antenna remoting", where photonic and fiberoptic technologies are used to transmit RF signals from an antenna to a remote receiver. You can buy commercial systems to do this. I once designed such a system for a government application to send RF signals from microwave antennas to receivers that were up to 10 km away. These applications exploit the advantages of optical fiber, namely (1) extremely low loss compared to conventional RF methods that use coax or other copper media, and (2) the extremely wide bandwidths (thousands of GHz) that can be supported in fiber. That's why the telecom industry now uses fiberoptics for commercial networks, particularly for WAN applications.
However, optical fiber solutions make sense only when the application pushes the limitations of conventional RF transmission techniques like coax or twisted pair. I honestly can't imagine any lowband amateur need where this would be the case. And optical solutions come at a cost. High performance optical transmitters and receivers that provide low noise and high dynamic range do exist but they are not cheap by amateur radio standards. It's much easier and far less expensive to make coax (or twisted pair, if you prefer) work properly. 73, John W1FV _________________ Topband Reflector