Apparently they are optimistic after this initial win:

Researchers at Duke University, however, are getting closer to creating this kind of a light source. A team from the Pratt School of Engineering was able to push semiconductor quantum dots to emit light at over 90 gigahertz.

This is some background on optical fiber uses from wikipedia:

Optical fiber is also used in imaging optics. A coherent bundle of fibers is used, sometimes along with lenses, for a long, thin imaging device called an endoscope, which is used to view objects through a small hole. Medical endoscopes are used for minimally invasive exploratory or surgical procedures. Industrial endoscopes (see fiberscope or borescope) are used for inspecting anything hard to reach, such as jet engine interiors. Many microscopes use fiber-optic light sources to provide intense illumination of samples being studied.

We are looking forward to more progress in this area as optics seem to be the future of microprocessing, data transmission and so many areas in science!

thanks to techtimes.com for the great info