Video 1.
The Story of Light by Bell Labs (2015)
. Source. Gives some ideas of the history of fiber optics. Features: Herwig Kogelnik.
Video 2.
Fiber optic cables by EngineerGuy
. Source.
These are closely related to lasers, as they do a similar basic job: take a DC source as input and amplify light. Lasers just happen to use the input voltage to also generate the incoming light.
These are pretty cool, they are basically a laser
This one was a huge advance it seems.
Video 1.
Erbium-doped fiber amplifier by Millennium Technology Prize
. Source.
It's the thing that allows you to connect fiber optics into a compter, or the corresponding port for the thing.
Many of them can take two fibers as input/output because fiber optics cables often come in pairs because it is needed for duplex.
Video 1.
How to choose SFP transceiver for fiber optical cable by FASTCABLING
. Source.
From a practical point of view single-mode:
  • upside: can go further without a repeater. In multi-mode optical fiber, different modes travel at different speeds, and start interfering with each other at some point
  • downside: lower bandwitdh, because we can fit less modes into it
As such, typical applications are:
From a mathematical point of view:
Figure 2.
2009 Nobel Prize lecture
. Poor Charles was too debilitated by Alzheimer's disease to give the talk himself! But if you've got a pulse, you can get the prize, so all good.
The book is a bit slow until Charles K. Kao comes along, then it gets exciting.

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