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What are the effects of temperature on optical fiber waveform

The temperature will change the refractive index and in consequence the speed of the wave. But experimentally, how do you measure it? You will need short pulse and a long fiber to have some resolution....
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Need help with reverse engineering a sensor

There are two issues at play: Why does the sensor work when it is covered in glue? Why doesn't it work in your tests? There are two perfectly good explanations. The glue is thermally conductive. ...
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