Potassium, sodium and lithium share a page because each needs only one or two wavelengths — and because the three of them together map the edges of what our conversion platform reaches. Potassium sits comfortably inside the SHG band, lithium inside the SFG band, and sodium in the gap between them.
Markers show the wavelengths these experiments call for. Bands beneath the axis show where QTekLaser™ generates light — by second-harmonic generation, sum-frequency generation, or directly from a single-frequency amplifier.
Both potassium D lines sit within a few nanometers of each other at the top of our SHG band. The 770 nm system is a stock product; 767 nm is the same platform retuned.
| Wavelength | Role in a K experiment | Output power | Source | Availability |
|---|---|---|---|---|
| 767 nm | D2 cooling | 2 W | SHG fiber laser765–805 nm | Configurable |
| 770 nm | D1 cooling, gray molasses, repumping & atomic absorption | 2 W | 770 nm Fiber Laser | Catalog |
Lithium’s D1 and D2 lines sit only 0.02 nm apart at 671 nm — a near-degenerate fine structure that makes sub-Doppler cooling difficult and puts a premium on a narrow, quiet source. 671 nm falls inside our sum-frequency generation band.
| Wavelength | Role in a Li experiment | Output power | Source | Availability |
|---|---|---|---|---|
| 671 nm | D1 and D2 cooling across the near-degenerate fine structure | up to 20 W | SFG fiber laser609–706 nm | Configurable |
The sodium D lines at 589 nm and 590 nm are among the hardest wavelengths in cold-atom physics to generate with a narrow linewidth and useful power. They fall between our SHG band, which ends at 540 nm, and our SFG band, which begins at 609 nm.
| Wavelength | Role in an Na experiment | Output power | Source | Availability |
|---|---|---|---|---|
| 589 nm | D2 cooling | — | Between the 506–540 nm SHG and 609–706 nm SFG bands | Inquire |
| 590 nm | D1 cooling | — | Between the 506–540 nm SHG and 609–706 nm SFG bands | Inquire |