foot, should i call the toe truck?
1) data-rate is not a limit imposed by the fiber, it depends on how good your receivers are1a) single mode fiber can also transmit multiple colors of light in parallel, the difference is that a multimode fiber has multiple paths for a single frequency (color) of lightSince these paths are of different length, the end result depends on how long your fiber is (thats dispersion)A receiver just measures the sum of all intensities2) Multimode fiber is just used with short cable lengths, so dispersion is not an issueFor example TOSLINK is a (very thick) multimode fiber used for digital audioThey even use a LED as a transmitter because they don't care about dispersionMultiple beams are also very expensive because you need multiple lasers with different colors, so you generally only use single-mode fiber of great length (like, transatlantic)For shorter lengths you use multiple cables3) Multimode fiber is almost never used these daysIt is not just the quality, also the thickness of the fiber has to be an exact diameter (not too thick) or it will become multimodeIn the past this was difficult, but now it has been perfected (and therefore cheaper).
No, the gentle won't mirror/refract properly interior the middle of the Fiber, and you will lose your sign, or have reflections back to the transmitting opticssingle mode with single mode, multimode with multimode.
Actually the maximum data-rate IS limited in multimodeWhen you inject a pulse of light down a MM fibre it will take multiple (hence the name multimode) paths through the fibre, as the length of the fibre increases the difference in transit time of these different paths causes a 'smearing' of the pulse, so even with a 'perfect' 100% sensitive receiver the time-smearing will limit the maximum distance for a given signal bandwidthMM fiber is cheaper primarily because it uses cheaper materials and manufacturing techniques and the connectors don't need to be as preciseSo to answer your questions: 1) Yes1a) See previous answersDifferent 'colours' of light are used when transmitting multiple streams, the separation in wavelengths between different colours can be very small (a few nM), so dozens of different coloured data-streams can be sent in 'parallel'This is called WDM (wavelength division multiplexing)2) See previous answersMM is fine for short distances or when you don't need very high data rates, the main reason MM exists is the cost of the substantially lower connectors, the cheaper (sometimes non-existent) focusing optics in the transmitters and receivers3) Don't confuse WDM with the transmitting parallel signals of the same wavelengthSM fiber by definition can't be bigger than a certain size.
Depends on how big that broken foot is.LOL If it was your cranium would you call a Crane?
