The QTekLaser™ 780 nm Fiber Laser delivers stable, narrow-linewidth (<5 kHz) output above 10 W from a reliable all-fiber, polarization-maintaining architecture. Optimized for rubidium-based atomic systems, it is widely used in neutral-atom quantum computing, laser cooling, atom interferometry, atomic clocks, and magnetometry, with an IoT-enabled control system in a 4U 19" rack-mount chassis.
Need a different wavelength? The 780 nm system is one configuration of our second-harmonic (SHG) platform covering 765–805 nm. We routinely build custom wavelengths across this range. Tell us your target line.
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 periodically poled crystal technology and the associated waveguide technology, nonlinear frequency conversion has become a powerful tool to extend the application scope of fiber lasers. For QTekLaser™ products, the max power of the converted laser light is constrained by the damage threshold of commercially available nonlinear crystals, which is typically several tens of watts.
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.
At the rubidium D2 line, the 780 nm system is critical for cold-atom experiments. With a narrow linewidth and >10 W of stable, polarization-maintaining power, it drives magneto-optical traps, laser cooling and trapping, optical pumping, and state preparation and detection, and it also serves Rydberg and precision-measurement setups that demand excellent beam quality.
