O'Reilly logo

Fiber Optics, Second Edition by Edward A. Lacy, Robert J. Hoss

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

3 Light Sources and Transmitters

Numerous devices are available for converting electronic signals to light waves for fiber-optic telecommunication systems. However, at present only two of these devices are really suitable for fiber optics: the LED and the injection laser diode (ILD). Both are semiconductor diodes that are directly modulated by varying the input current. They are close relatives, both being made of aluminum-gallium-arsenide (GaAlAs), gallium-aluminum-arsenide-phosphide (GaAlAsP), or gallium-indiumarsenide-phosphide (GalnAsP).

3.1 Optical Sources

The LEDs used in fiber optics are similar to those LEDs used in numerous display applications with the exception that the display devices emit in the visual region (600- to 800-nm wavelength), ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required