Facts about Fiber Optics
- 08
Quantum key distribution has been successfully transmitted through fiber optic cables, with China's Micius satellite achieving 1,200 kilometers of secure quantum communication in 2017.
- 07
Total internal reflection allows fiber optic cables to bend light around corners at angles up to 90 degrees without losing the signal through the cable walls.
- 06
The 1550-nanometer wavelength is preferred for long-distance fiber optic transmission because silica glass exhibits its lowest attenuation at this infrared frequency.
- 05
Chromatic dispersion in fiber optic cables causes different wavelengths of light to travel at slightly different speeds, requiring dispersion-compensating modules every 80 kilometers to prevent signal degradation.
- 04
Modern undersea fiber optic cables contain 16 fiber pairs and can transmit approximately 400 terabits per second, enabling 99 percent of intercontinental data traffic worldwide.
- 03
A single fiber optic strand thinner than human hair can transmit 400 terabits of data per second, equivalent to streaming 10 million HD movies simultaneously.
- 02
Light traveling through fiber optic cables moves at approximately 200,000 kilometers per second, or about 67 percent the speed of light in vacuum.
- 01
In 1988, the first transatlantic fiber optic cable transmitted data at 280 megabits per second across 15,000 kilometers.