fluorescence of materials via DPSS green beams

[opcom]

In playing with the DPSS green lasers here, both '532', I directed the beam though a vial of lamp oil, and where the beam passed through, the track was a bright yellow color. The exiting beam was the same green.

I also directed the beam at an orange acrylic type picnic plate, the transparent type, and it fluoresced brightly orange.

What is the cause of this? To my knowledge, there is no yellow producing element in the lasers, just the 808nm diode, a 1064 YAG crystal, and the doubler crystal.

[discothefunkyhippo]

http://en.m.wikipedia.org/wiki/Fluorescence#_

Fluorescence is a result of the interaction between the light and the object reflecting the light. The properties of the object reflecting the light is just as important as the properties of the light to understanding the fluorescence in question.