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.
The ultra-stable, narrow-linewidth output of the 1064 nm fiber laser (≤ 20 kHz) makes it well suited for optical trapping and cooling of neutral atoms or ions. In optical dipole traps, far-off-resonant lasers (such as 1064 nm for certain atomic species) create conservative potentials that confine atoms with minimal photon scattering, enabling long coherence times. The low relative intensity noise (<-140dBc/Hz >10kHz) and high beam quality (M² < 1.05) ensure very stable trapping potentials, which is critical to suppress heating and decoherence. Moreover, the high power (up to 50 W) is useful for creating deep potentials and for multiplexed or large-volume traps in quantum gas or quantum computing setups.
The same laser can be employed for qubit control via Raman transitions, stimulated two-photon processes, or state-dependent forces. For example, in atomic qubit architectures (e.g. alkali or alkaline-earth atoms), two-photon Raman coupling often uses detuned laser fields to address ground-state hyperfine transitions. The narrow linewidth and good frequency stability of this fiber laser help suppress off-resonant scattering and phase noise, improving gate fidelity. The polarization-maintaining(PM) output is also beneficial where polarization control is critical for selection rules in state coupling.
Beyond simple trapping and control, the 1064 nm fiber laser can support protocols for entangling qubits—either via mediated interactions or via motional coupling. High-power, low-noise beams can generate optical potentials that bring qubits into strong interactions (e.g. via controlled collisions, Rydberg-state interactions, or motional gates). The laser’s stability in amplitude, polarization, and pointing reduces decoherence channels during entangling operations.
Additionally, as quantum computing systems scale, multiplexed beam delivery becomes important (e.g. many traps addressed in parallel, optical lattices, cross-beam interrogation). A fiber-based design with polarization-maintaining architecture simplifies beam routing, splitting, and delivery to multiple zones or optical setups. It also reduces susceptibility to environmental drifts or mode distortions. In sum, ahigh-performance 1064 nm fiber laser can serve as a backbone resource in quantum computing platforms, enabling stable trapping, coherent control, and high-fidelity entangling operations.
Quantum networks rely on exquisitely controlled, low-noise optical signals to transmit quantum states (e.g. single photons, entangled photons) over fibers or free-space links. The 619 nm fiber laser from QTekLaser™ offers a compelling light-source solution for quantum networking platforms that exploit visible-wavelength transitions (for instance, in certain quantum memories, frequency converters, or quantum repeaters).