How long does it take for a signal in fiber to go from point a to point b? Is it at close to the speed of light? And what is the package lost pr meter?

Question

anonymous · Answer

Not usually, no.  The speed of light in a medium is c/n, where n is the index of refraction.   For glass n is usually about 1.5, so the speed of light is about 2/3 of c.  I know of no easy way to figure the loss of amplitude per length.  You probably just have to measure it.  If I look it up it looks like 0.2 dB/km is a typical good result.

anonymous · Answer

You should find more information here. http://www.rpi.edu/dept/phys/Dept2/APPhys1/optics/optics/node7.html Not sure how you can quantify loss per meter I'm not familiar with the subject.