March 2019

Charles Kao in 1966, measuring the transparency of fused silica at Stanford Telecommunications Labs in Harlow, U.K.

The Remarkable Fiber Optic Vision Of Charles Kao

Jeff Hecht

Five decades ago, the late Charles Kao asked how clear a glass material could be made. The answer made fiber optics the future of telecommunications.

In-Fiber Silicon Photonics

The maturing of methods for fabricating semiconductor core fibers is opening up opportunities in optical communication and beyond.

Time to Open the 2-μm Window?

Extending fiber communications to a longer wavelength could help ease capacity issues—and will require intense development in fiber technology, active and passive semiconductor components, and silicon photonics.

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