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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 report on a semiconductor disk laser emitting 1.5 W of output power at the wavelength of 745 nm via intracavity frequency doubling. The high power level and the >40 nm tuning range make the laser a promising tool for medical treatments that rely on photosensitizing agents and biomarkers in the transmission window of tissue between 700 and 800 nm. The InP-based gain structure of the laser was wafer-fused with a GaAs-based bottom mirror and thermally managed with an intracavity diamond heat spreader. The structure was pumped with commercial low-cost 980 nm laser diode modules. Laser emission at 1490 nm was frequency-doubled with a bismuth borate crystal that was cut for type I critical phase matching. At the maximum output power, we achieved an optical-to-optical efficiency of 8.3% with beam quality parameter M2 below 1.5. The laser wavelength could be tuned with an intracavity birefringent plate from 720 to 764 nm.

We demonstrate 1.5 W of output power at the wavelength of 750 nm by intracavity frequency doubling a wafer-fused semiconductor disk laser diode-pumped at 980 nm. An optical-to-optical efficiency of 8.3% was achieved using a bismuth borate crystal. The wavelength of the doubled emission could be tuned from 720 to 764 nm with an intracavity birefringent plate. The beam quality parameter M-2 of the laser output was measured to be below 1.5 at all pump powers.