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20 February 20173.5 W of diffraction-limited green light at 515 nm from SHG of a single-frequency tapered diode laser
Ole Bjarlin Jensen,1 Anders Kragh Hansenhttps://orcid.org/0000-0002-4632-6538,1 André Müller,2,3 Bernd Sumpf,2,3 Paul Michael Petersen,1 Peter E. Andersen1
1DTU Fotonik (Denmark) 2Ferdinand-Braun-Institut (Germany) 3Leibniz Institut für Höchstfrequenztechnik (Germany)
Multi-Watt efficient compact green laser sources are required for a number of applications e.g. within biophotonics, laser pumping and laser displays. We present generation of 3.5 W of diffraction-limited green light at 515 nm by second harmonic generation (SHG) of a tapered diode laser, itself yielding more than 9 W at 1030 nm. SHG is performed in single pass through a cascade of two nonlinear crystals with re-focusing and dispersion compensating optics between the two nonlinear crystals. The laser is single-frequency and the output power is stabilized to better than ±0.4%.
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Ole Bjarlin Jensen, Anders Kragh Hansen, André Müller, Bernd Sumpf, Paul Michael Petersen, Peter E. Andersen, "3.5 W of diffraction-limited green light at 515 nm from SHG of a single-frequency tapered diode laser," Proc. SPIE 10088, Nonlinear Frequency Generation and Conversion: Materials and Devices XVI, 1008803 (20 February 2017); https://doi.org/10.1117/12.2249671