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Re: Fields can be nonlinear

What does the non-linearity mean in the context of a laser?

Chuck Britton wrote:

The (expensive) Green Diode pocket lasers us non-linear optics
to double the laser frequency into the green color. I THINK
this counts as interacting fields (not static tho).

And so does a simple diode. Connect it to an electric generator
of a pure sinusoidal signal and the output signal will contain
higher f components. Why? Because the diode has a non-linear
I-V characteristics (say between -5 and +5 volts). Whould this
also "count as interacting fields"?

Ludwik Kowalski