532 nm Fiber Laser

Second-Harmonic Generation (SHG)

QTekLaser^TM offers laser systems with extended wavelength range by combining nonlinear frequency conversion technologies. Through second-harmonic generation (SHG) we achieve significant laser power at the visible and NIR regime (figure 2;  red-shaded cells of table 1).  With the development of periodic 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^TM 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.

Ordering Information

Performance

Power Stability

Figure 3. Power Stability: 532 nm @14 W, <1%.
Ripples caused by HVAC fluctuations overnight.

Beam Quality

Figure 4. Beam Quality: 532 nm M² <1.1

Beam Profile

Figure 5. Beam Profile 532 nm

Relative Intensity Noise (RIN)

Figure 6. Relative Intensity Noise (RIN): 532 nm <-135 dBc/Hz >10kHz

Optical Spectrum

Figure 7. Optical Spectrum: 532 nm SMSR 60 dB

Laser Power vs. Current 

Figure 8. Laser Power vs. Current: 532 nm 

Thermal Lensing Effect

Figure 9. Thermal Lensing Effect on Beam Size: 532 nm 

Quantum Applications

The 532 nm fiber laser — with ultra-narrow linewidth (< 20 kHz), low relative intensity noise (-135 dBc/Hz >10kHz), and polarization-maintaining, high beam quality output — is a compelling tool for quantum science platforms. At visible wavelengths, it enables resonant or near-resonant manipulation of atomic transitions (for species where green light is used) and can augment cooling, state preparation, or optical pumping steps. Its compact, stable, SHG-based architecture ensures that the delivered beams remain spectrally and spatially stable over long experimental runs, which is critical to preserving coherence in quantum systems.

In neutral atom architectures that use green transitions(for example, in certain cooling or state-preparation stages), this 532 nm source can serve in optical molasses, polarization gradient cooling, or repumping. After initial laser cooling stages, the same laser can be used for state preparation or shelving pulses before qubit operations. Moreover, when combined with intense far-off-resonance trapping beams (from, say, 1064 nm),the 532 nm beams can create state-dependent potentials or light shifts to control internal states. The narrow linewidth and precise frequency control reduce off-resonant scattering and phase noise, preserving qubit coherence during manipulations.

For entanglement protocols or multi-qubit gates, 532 nm beams may drive Raman transitions or sideband couplings in hybrid schemes, or provide fast local addressing for individual qubits via tightly focused beams. Their stability limits technical noise that might otherwise degrade gate fidelities. In quantum sensing or metrology contexts, the 532 nm laser can also play a role in state readout, fluorescence excitation, or probing atomic transitions with minimal perturbation. Overall, a high-performance 532 nm fiber laser is a versatile enabler in quantum computing stacks, not just for cooling and trapping but for precision state control and readout.

Mechanical Dimensions

Product Photos

Figure 11. 532 nm fiber laser system 4U chassis water cooled

Figure 12. 532 nm fiber laser system 4U chassis back panel water cooled

Figure 13. 532 nm laser head operating

Figure 14. 532 nm laser head

Figure 15. 532 nm laser head front

Figure 16. 532 nm laser head back