Recent progress in THz lasers has made the heterodyne laser technique moot:
https://phys.org/news/2020-06-breakthrough-multi-watt-terahertz-lasers.html
On 10/13/2020 12:21 PM, JonesBeene wrote:
The beat frequency they were after was in the THz range and this was
in order to fit Hagelstein’s theory of optical phonons –
… and yes - small gain was seen.
However, in the earlier similar work without beat frequencies –
single laser only - much higher gain (order of magnitude more) has
been reported by Letts/Cravens.
The reproducibility was apparently better in the later experiments -
but I do not think the lower result with the beat frequency is
leading anywhere.
*From: *H LV <mailto:hveeder...@gmail.com>
Beat frequencies of two lasers irradiating a surface appear in
_Stimulation of Optical Phonons in Deuterated Palladium_ by Dennis
Letts and Peter Hagelstein
https://www.lenr-canr.org/acrobat/LettsDstimulatio.pdf
Harry
