If light travels in a Fiber Splicer, then it need a continuous, non-disruptive path so that it can travel a long distance that to without any big signal loss. There comes the requirement for light signals to be amplified, cross-connected, added or dropped in a radius of hundreds of kilometers fiber link. As a standard practice, two fibers are connected together in these types of connections. You can perform this connection with the help of connectors and splicing.