On Jan 9, 2013 11:02 AM, "John Griessen" <john@industromatic.com> wrote:
On 01/09/2013 12:19 AM, Patrik D'haeseleer wrote:Probably. That kind of treatment "transforms" the nonlinear into the linear for ease of calculations.
I suspect his professor meant that the *frequencies* get added and subtracted. Which you achieve by multiplying the signals.
Hmm, I am still thinking about this sort of thing, and just came across an article that seems to confirm that this sort of technique works/exists... but for some reason (dogma/history/technical-language-barriers??? or something else I'm failing to understand) they don't call it optical heterodyning, but rather 'sum frequency generation':
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