Fiber-optically isolated oscilloscope probe for floating signals

January 16, 2017 // By Julien Happich
Teledyne LeCroy's HVFO high voltage fiber-optically isolated oscilloscope probe is optimally designed for the measurement of small signals floating on a HV bus in power electronics designs.

Optical isolation between the probe tip and the oscilloscope input reduces adverse loading of the device under test (DUT); and also reduces noise, distortion, ringing, overshoots, and transients on the measured signal. It far surpasses the measurement capabilities and signal fidelity of both conventional HV differential probes and acquisition systems that rely on galvanic channel-to-channel and channel-to-ground high voltage isolation. Furthermore, it mitigates reliance on dangerous test setups that require floating the oscilloscope and probe, or investments in specialized isolated oscilloscope or data acquisition systems that result in other performance compromises. 

The HVFO architecture is simple, with a single laser and fiber optic cable providing optical isolation and modulated signal + data communication. Multiple tips achieve different operating voltage ranges. The HVFO is small enough to fit in tight spaces, provides just enough performance for real-world needs, and is affordable enough to fit the tightest of equipment budgets.

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