The transmitter offers a choice of modulation – a variable frequency audio tone and a 250 kHz square wave for speed of light investigations. The receiver contains a user variable gain amplifier with integral loudspeaker as well as direct monitoring sockets for an oscilloscope.
The system is completed with 5m and 20m sheathed polymer optical fibre coils terminated with clip housings to mate with the transmitter and receiver units. The wavelength used is in the visible red part of the spectrum and with the modulation set at 1 Hz the pulsing beam can be easily seen so that the fibre optic principle can easily be demonstrated.
Full experimental details included.
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