Hands-on Educational Experimentation with LEDs, Optical Fibers and Photodiodes in a Modern Technology Dependent Society
2010
In this paper we describe an experiment with LED circuit and photodiode circuit. We take measurements and study the device in both conditions: without and with optical fiber between LED and photodiode. With a second experiment, developed for demonstration purposes, we transport through optical fiber digital signal from transmitter of infrared light, suitably shaped, in corresponding receptor. We describe phenomena like light emission, the inverse square law of light emission, the photoelectric effect, the reflection and transmission of light. Also we mention the significance of LEDs, photodiodes and optical fiber applications in modern technology dependent societies.
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