On 10/13/2020 6:03 PM, Jones Beene wrote:
Have you been able to buy one?
As you suggested, there's a gap in the wavelength of commercially
available systems. Semiconductor diode lasers seem to be currently
available down to 3.5 um (83 THz)
https://www.toptica.com/products/tunable-diode-lasers/ecdl-dfb-lasers/dfb-pro/
Optically pumped secondary lasers are available up to 7.5 THz / 100 mW,
typically used in security scanners.
https://www.edinst.com/products/firl-100-pumped-fir-system/
There appears to be a lot of current research to fill the gap, so
hopefully available soon but not quite yet.
