The QTekLaser™ 795 nm Fiber Laser is a high-precision system optimized for quantum computing, quantum sensing, atomic interferometry, and laser cooling and trapping. Built on second-harmonic generation (SHG), this all-fiber 4 W laser delivers exceptional performance in a compact, industrial-ready 3U 19" rack-mount chassis with an IoT-enabled control interface.
Need a different wavelength? The 795 nm system is one configuration of our second-harmonic (SHG) platform covering 765–805 nm — need 780, 793, or another nearby line? We routinely build custom wavelengths across this range. Tell us your target.
QTekLaser™ offers laser systems with extended wavelength range by combining nonlinear frequency conversion technologies. Through second-harmonic generation (SHG) we achieve significant laser power in the visible and NIR regime (figure 2; red-shaded cells of table 1). With the development of waveguide technology, nonlinear frequency conversion has become a powerful tool to extend the application scope of fiber lasers.
SFG Output Wavelength Matrix
SF-AMP-Tm2 (865 – 1030 nm)
SF-AMP-Yb (1012 – 1112 nm)
SF-AMP-Er (1530 – 1610 nm)
SF-AMP-Tm (1730 – 2060 nm)
SF-AMP-Yb (1012 – 1112 nm)
466 – 535 nm
506 – 556 nm
SF-AMP-Er (1530 – 1610 nm)
553 – 628 nm
609 – 658 nm
765 – 805 nm
SF-AMP-Tm (1730 – 2060 nm)
576 – 687 nm
638 – 722 nm
812 – 904 nm
865 – 1030 nm
Table 1. Wavelength extension of QTekLaser™ products via nonlinear frequency conversion. The red-shaded cells represent second-harmonic generation (SHG) and the blue-shaded cells sum-frequency generation (SFG).
Figure 2. QTekLaser™ fiber laser system with an integrated frequency doubler.
QTekLaser™ lasers comply with Federal Regulations (21 CFR Subchapter J, Part 1040) as administered by the Center for Devices and Radiological Health and are certified to IEC 60825-1:2014 standards.
It is the end user's responsibility to ensure that no significant light is retroreflected back into QTekLaser™ systems as this can degrade performance and potentially damage the lasers. To prevent this, the use of an external optical isolator is strongly recommended. Damage due to retroreflected light is not covered under warranty.
Figure 3. Beam Profile 795 nm. The beam is collimated with a Thorlabs F220APC-780 collimator, not included. It exhibits an excellent, round Gaussian profile with a 1/e² beam diameter of 1.9 mm.
Figure 7. Tunability: Frequency vs. Seed Laser Temp. 795 nm.
Tunability Wavelength vs. Seed Laser Temp.
Figure 8. Tunability: Wavelength vs. Seed Laser Temp. 795 nm.
Tunability Frequency vs. Seed Laser Current
Figure 9. Tunability: Frequency vs. Seed Laser Current 795 nm.
Tunability Wavelength vs. Seed Laser Current
Figure 10. Tunability: Wavelength vs. Seed Laser Current 795 nm.
Optimal SHG Temperature vs. Wavelength
Figure 11. Optimal SHG Temperature vs. Wavelength 795 nm.
Quantum Applications
The 795 nm laser addresses the rubidium D1 transition for gray-molasses cooling and clean optical pumping. Its 4 W of low-noise, single-frequency output supports sub-Doppler laser cooling and trapping, atomic interferometry, and quantum-sensing platforms that need a stable D1 source alongside their D2 lasers.
