You never get that with fiber optics to start with - total internal reflection implies the light is traveling a fairly complicated geometry anyway. To do a stra

You never get that with fiber optics to start with - total internal reflection implies the light is traveling a fairly complicated geometry anyway. To do a straight line path it wouldn't be a fiber cable, it would be a tube which you'd have to pressurize and then do a fair bit of work to try and keep from flexing out of alignment (although 3 reflections as opposed to hundreds of thousands probably helps).