The QTekLaser™ 770 nm Fiber Laser is a high-performance source for atomic physics, quantum research, potassium transitions, laser cooling, and interferometry. Using second-harmonic generation (SHG), it delivers up to 2 W of narrow-linewidth, polarization-maintaining output in a compact 3U 19" rack-mount chassis with an IoT-enabled control system.
Need a different wavelength? The 770 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 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.
Ordering Information
Part Number: QT-LASR-SHG-770-2-W-2-2.0-0
Laser Type: Seed laser + Er-doped fiber amp + SHG
Note: Also available in 4 W and 7 W versions. Contact factory.
Figure 3. Beam Profile 770 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 1.7 mm.
Laser Power vs. Current
Figure 4. Laser Power vs. Current 770 nm.
Optical Spectrum
Figure 5. Optical Spectrum: 770 nm OSNR 50 dB
AMO Application Potassium D1 Atomic Absorption
Figure 6. AMO Application: Potassium D1 Atomic Absorption 770 nm.
Figure 8. Polarization Extinction Ratio (PER) 770 nm 21.7 dB.
Quantum Applications
The 770 nm fiber laser is designed for neutral-atom quantum-computing. Its narrow-linewidth, 2 W output supports repumping and metastable-state reset, state-selective readout, and the leakage- and erasure-detection steps that raise gate fidelity in array-based processors with enough headroom to feed several beam paths from one laser.
