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Measuring power out of a fiber in the range of tens of uW to a few mW

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Measuring power out of a fiber in the range of tens of uW to a few mW

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We recently came across an interesting customer problem, in which every time he disconnected the Fiber Optics connector from the adapter (that is mounted on the sensor) and then reconnected it, the power read about 50-100 uW higher than it did (nothing else changed). It then took about 10 minutes to slowly come back down to what it had been. After an investigation, we found that the increase in reading when disconnecting/reconnecting the fiber connector is a thermal effect, and not a technical flaw in the unit.

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