Fred wrote: > Known-Measured Effects related to the Brillouin Effect: > Lamb Shift. > Raman Effect (Stokes and AntiStokes lines).. > Compton Effect. > This (Stimulated Brillouin Scattering) research covers a lot: > http://www.nat.vu.nl/atom/thesis-iavor.pdf
This discussion brings up a question that I don't know if anyone has bothered to ask, much less answer. One useful effect of stimulated Brillioun scattering is the frequency doubling of laser wavelengths. This is such a coherent effect I don't know if you could call it scattering, but it's called SBS anyway. The now familiar green laser pointer works this way. A diode pumped 1064nm laser is focused through a potassium dihydrogen phosphate crystal and the resulting optically induced electrostriction causes the non-linear SBS effect and you get that 532nm green color. Deuterated versions of these non-linear crystals are usually used instead of the compounds with ordinary hydrogen. I've never really thought about why this is done, although apparently the deuterated crystals are known to be more efficient. Could some CF be going on in these crystals unnoticed? In other words, if you measure the optical energy of the laser wavelength going in, the unconverted laser energy, the energy of the doubled wavelength, and the waste heat given off do you arrive at over unity? Just a mindless speculation. M. _______________________________________________ Join Excite! - http://www.excite.com The most personalized portal on the Web!
