Vertical-External-Cavity Surface-Emitting Lasers (VECSEL) have emerged as an attractive single-frequency laser platform for quantum technology applications utilizing trapped ions, neutral atoms, and cold molecules. VECSELs exhibit a unique combination of features including high-power single-frequency operation, excellent beam, and the ability to cover a broad wavelength range from the ultraviolet to visible and to infrared. Here recent developments of compact and modular VECSELs for the industrial scale-up of quantum applications are presented, together with most recent data for wavelength versatility and linewidth narrowing to sub-Hz.
VECSELs have already been successfully used for quantum experiments based on ion and atom systems, where the main desired features are narrow linewidth, low noise, and stability. Here we are exposing the broad tuning capability of the VEXLUM VALO single-frequency laser platform for the resonant excitation of recently developed GaSb-based semiconductor quantum dots, which can provide single-photon emission in the 3rd telecom widow. The VECSEL allows direct excitation of a single quantum dot and elimination of complex charge relaxation paths in the surrounding semiconductor matrix, thus improving the charge stability of the quantum dot.
Vertical-external-cavity surface-emitting lasers (VECSELs) have emerged as an attractive single-frequency laser platform for quantum computing and -sensing applications including optical clocks. VECSELs exhibit a unique combination of features including high-power single-frequency operation, excellent beam, and the ability to cover a broad wavelength range from the ultraviolet to visible and to infrared. Here a compact commercial VECSEL platform with sub-Hz linewidth for optical lattice clocks is presented including recent data for Sr and Yb systems.
Progress of commercial single-frequency VECSELs for quantum technology applications is reviewed. Availability of practical laser systems with specific wavelength matching an atomic transition is instrumental for the quantum technology research experiments and is becoming increasingly important for the upscaling of commercial quantum systems. To this end, we present a versatile commercial single-frequency VECSEL platform operating in the ultraviolet, visible and NIR -spectral ranges. The suitability of the laser systems for a wide variety of quantum information processing tasks, including spectroscopy, photoionization, and laser cooling is demonstrated.
We review the progress of commercial single-frequency VECSELs for quantum technology applications. VECSELs are ideal laser sources for applications requiring low-noise watt-level single-frequency light with excellent beam quality. In particular, we present features of lasers addressing the need for spectroscopy, laser cooling and trapping for selected atoms and molecules, such as Be, Cd, Sr and Yb. Power scaling abilities in single-frequency operation are also discussed.
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