The QTekLaser™ 649 nm Fiber Laser utilizes sum-frequency generation (SFG) to deliver stable, narrow-linewidth (<10 kHz), polarization-maintaining light up to 6 W, optimized for single-qubit gate operations. 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.
Need a different wavelength? The 649 nm system is one configuration of our sum-frequency (SFG) platform covering 609–706 nm. We routinely build custom wavelengths across this range. Tell us your target line.
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.
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).
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.
The 649 nm system delivers 6 W of stable red light for trapped-ion and neutral-atom quantum computing. It supports single-qubit gate operations, signal readout, and repumping, and its low noise makes it well suited to mid-circuit measurement, where selected qubits are read out without disturbing the rest of the register.
