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Fiber Optic Reference Guide, 3rd Edition
book

Fiber Optic Reference Guide, 3rd Edition

by David Goff
March 2002
Intermediate to advanced content levelIntermediate to advanced
260 pages
9h 58m
English
Routledge
Content preview from Fiber Optic Reference Guide, 3rd Edition

6 LIGHT DETECTORS

 

 

Light detectors perform the opposite function of light emitters. Emitters, as we already know, are electro-optic devices. They convert electrical pulses into light pulses. Detectors are opto-electric devices. They convert the optical signals back into electrical impulses that are used by the receiving end of the fiber optic data, video, or audio link. The most common detector is the semiconductor photodiode, which produces current in response to incident light.

In an LED, the energy emitted during the recombination of electron-hole pairs is in the form of light. In a photodiode, the opposite phenomenon occurs. Light striking the photodiode creates a current in the external circuit. Absorbed photons excite the electrons and ...

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Publisher Resources

ISBN: 9780240804866