Products like [1] an oscilloscope probe with ±60,000V isolation.
[1] https://www.tek.com/en/products/oscilloscopes/oscilloscope-p...
[1] https://www.tek.com/en/products/oscilloscopes/oscilloscope-p...
I'd expect a normal optoisolator module to work for a probe like that. No need for 180mA+ transferred between circuits.
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An oscillator probe is an example where electrical isolation + signal (aka: communications) are useful. But under no circumstances should 500mW of power be sent through such a setup in either direction.
> I'd expect a normal optoisolator module to work for a probe like that.
Absolutely not. "Standard" optoisolators tend to be slow and have analog characteristics which are unsuitable for an oscilloscope.
But the numbers discussed here is a lot more power than I was expecting. I'm guessing that at the GHz-range, everything uses more power though.