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Dave's Circuits
Circuits designed by David Johnson, P.E.

Master Category List - Dave's Circuits
Last Updated on: Monday, April 21, 2008 04:18 AM


Fiber Optic Circuits    Light Detectors
 
BROAD BAND 50MHz OPTICAL FIBER RECEIVER VERSION A
If the above circuit it still too slow, you can try this circuit. What it lacks in sensitivity it makes up for in speed. The circuit attaches a plastic fiber optic PIN photodiode assembly to a small box containing a small 3v battery and a standard BNC plug. When the box is plugged into to the input of an oscilloscope with a 50-ohm termination resistor, it can detect light pulse frequencies beyond 100MHz.

Click on Drawing Below to view PDF version of Schematic

50MHz Bandwidth Light Probe designed by Dave Johnson, P.E. (June 4, 2000)

Fiber Optic Circuits    Light Detectors
Master Schematic Category List - David A. Johnson, P.E.
 

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