3 March 2014 High-efficiency tunable yellow-orange VECSEL with an output power of 20 W
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We report on the development of a high-efficiency frequency doubled vertical-external-cavity surface-emitting laser with an output power of 20 W and emission spectrum centered at 588 nm. The MBE-grown gain chip incorporated 10 GaInAs quantum wells and emitted in the 1180 nm range. The frequency conversion was achieved using a lithium triborate nonlinear crystal in an intra-cavity configuration. In addition to the nonlinear crystal, the V-shaped cavity also included a birefringent filter and an etalon for linewidth narrowing and wavelength tuning. The maximum optical-to-optical conversion efficiency obtained was ~28 % for 16 W of output power and the VECSEL had a tuning bandwidth of ~26 nm ranging from about 576 to 602 nm. We were also able to generate yellow pulses down to 570 ns duration by directly modulating the VECSEL’s pump laser.
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Emmi Kantola, Tomi Leinonen, Sanna Ranta, Miki Tavast, Mircea Guina, "High-efficiency tunable yellow-orange VECSEL with an output power of 20 W", Proc. SPIE 8966, Vertical External Cavity Surface Emitting Lasers (VECSELs) IV, 89660D (3 March 2014); doi: 10.1117/12.2037676; https://doi.org/10.1117/12.2037676

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