The QTekLaser™ 609 – 658 nm Fiber Laser class utilizes sum-frequency generation (SFG) to deliver stable, narrow-linewidth (<10 kHz), polarization-maintaining light up to 6 W. With <1% power stability and an IoT-enabled interface in a compact 4U 19" rack-mount chassis, it is easily integrated into neutral-atom quantum machines.
The wavelength range of QTekLaser™ products can be further extended using the nonlinear process of sum-frequency generation (SFG). This architecture is illustrated in figure 1. The two fundamental lasers are usually made of different gain fiber amplifiers. The extended wavelength values are summarized in the blue-shaded cells of table 1. This method achieves high power at certain wavelengths.
Figure 2. QTekLaser™ sum-frequency generation (SFG) fiber laser system. The frequency sum mixer is integrated into the product.
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.
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.
