The QTekLaser™ 765 – 805 nm Fiber Laser class 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.
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.
Output Wavelength Matrix
SF-AMP-Yb2 (506 – 556 nm)
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-Yb2 (506 – 556 nm)
253 – 278 nm
SF-AMP-Tm2 (865 – 1030 nm)
319 – 361 nm
432 – 515 nm
SF-AMP-Yb (1012 – 1112 nm)
304 – 371 nm
466 – 535 nm
506 – 556 nm
SF-AMP-Er (1530 – 1610 nm)
380 – 413 nm
553 – 628 nm
609 – 658 nm
765 – 805 nm
SF-AMP-Tm (1730 – 2060 nm)
391 – 438 nm
576 – 687 nm
638 – 722 nm
812 – 904 nm
865 – 1030 nm
Table 1. Wavelength extension of QTekLaser™ products via nonlinear frequency conversion. Yb² and Tm² denote frequency-doubled Yb and Tm amplifiers. Red: harmonic generation (SHG, or FHG via two cascaded SHG stages). Blue: sum-frequency generation (SFG), including cascaded SHG+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.
