I am curious if I could take lets say an 500mw 382nm laser diode and a lets say 910nm diode of the same power output density for a astigmatically corrected collimated beam/spot size and mix the 2 lasers and produce the difference frequency of 528nm or some other similar combination of various high power laser diodes at 382nm-920nm, I am used to doing this in audio work microwave uhf vhf. Can this be done by mixing of two lasers to produce the sum or difference frequencies???