Keys to high-power operation of disk lasers are a thin active layer, a small Stokes shift and an efficient cooling, best realized with a limited number of QWs which are pumped close to the laser wavelength and which are in close contact with one or two diamond heat sinks. To get sufficient pump absorption many passes of the pump radiation are needed. This can be realized either by taking advantage of intrinsic resonances (designed for the pump radiation) or by an external multi-pass optics (known from Yb disk lasers) or a combination of both. The various options will be discussed and some results for AlGaInP disk lasers will be presented.
Uwe Brauch, Cherry May N. Mateo, Hermann Kahle, Roman Bek, Michael Jetter, Marwan Abdou Ahmed, Peter Michler, and Thomas Graf, "Schemes for efficient QW pumping of AlGaInP disk lasers," Proc. SPIE 10087, Vertical External Cavity Surface Emitting Lasers (VECSELs) VII, 1008703 (Presented at SPIE LASE: January 30, 2017; Published: 22 February 2017); https://doi.org/10.1117/12.2250901.
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