20,000 Leagues Inside the Optical Fiber
summary
Shows how lasers plus silica fiber trap light inside an 8 µm glass core and use coherence to encode data by amplitude, frequency and especially phase interference, then multiplex dozens of colors into 40 wavelengths per fiber. Claims modern single-mode fiber has about 0.2 dB/km loss (roughly 62 miles to 1% power) and common cables hit ~3.2 Tb/s while lab demos push ~31 Tb/s and even a published 255 Tb/s experiment. Covers dispersion and other impairments and how WDM and advanced modulation overcome them.
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chapters (9)
- 0:00Intro
- 0:26Our Ancestors
- 0:55Bell Phone
- 2:55Laser
- 3:53Fiber Optic
- 5:08Copper Wire
- 5:36Transmission Capacity
- 7:10Multiple Channels
- 9:10Conclusion
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