Abstract
We present a vertical external cavity surface-emitting laser system based on a multi-quantum-well structure with 20 compressively strained GaInP quantum wells for an operation wavelength of around 665 nm with a monolithic integrated distributed Bragg reflector. With the help of an intra-cavity diamond heatspreader the laser operates in continuous-wave mode. Operation with a TEM00 Gaussian beam profile and a beam propagation factor of M 2≤1.05 is shown as well as a high resolution spectrum of the laser line, which shows the etalon effect of the diamond. The laser can be operated at a maximum output power exceeding 1.2 W with a slope efficiency of η diff=18%. At maximum output power the wavelength of the laser resonance is at 670 nm, which is shortest reported until now at powers exceeding 1 W. By rotating a birefringent filter in an extended folded cavity arrangement a wavelength tuning of 21 nm was attained.
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Schwarzbäck, T., Eichfelder, M., Schulz, WM. et al. Short wavelength red-emitting AlGaInP-VECSEL exceeds 1.2 W continuous-wave output power. Appl. Phys. B 102, 789–794 (2011). https://doi.org/10.1007/s00340-010-4213-5
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DOI: https://doi.org/10.1007/s00340-010-4213-5