How to connect entertainment center receiver to TV with Direct TV fiber optic service?

DTV doesn't have a fiber optic service.  Some DTV receivers have a fiber optic output that can plug to a fiber optic input on the entertainment system or TV.  You need to contact the entertainment center maker on how to connect it to a TV.  

DirecTV is a TV service delivered by satellite. They are not a fiber service.

Please explain a bit more in detail about what you're trying to do. Include models of boxes you have.