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Tuning of the high-brightness tapered laser and its applications

: Bohdan, R.; Bercha, A.; Mariani, O.; Wojdak, M.; Dybala, F.; Adamiec, P.; Trzeciakowski, W.; Weber, J.; Kelemen, M.T.


Christensen, N.E.:
12th International Conference High Pressure Semiconductor Physics, HPSP 2006. Proceedings : Barcelona, Spain, 31 July-3 August 2006
Weinheim: Wiley-VCH, 2007 (Physica status solidi. B, Basic research 244.2007, Nr. 1)
International Conference on High Pressure Semiconductor Physics (HPSP) <12, 2006, Barcelona>
Konferenzbeitrag, Zeitschriftenaufsatz
Fraunhofer IAF ()

Tapered lasers offer high beam quality together with high power. Wavelength tunability is therefore a valuable feature for such laser, making it a compact alternative for e.g. Titanium-Sapphire laser. We demonstrate the combination of fine tuning by grating (in the 30 nm range) with the coarse tuning by pressure (up to 12 kbar) for a high power tapered laser emitting around 960 nm at ambient pressure. At the fixed current of 1.5 A the laser was tuned in a 100 nm range (from 980 nm to 880 nm) emitting between 200 mW and 300 mW with high quality of the beam. We examined the possibility of using pressure-tuned tapered laser diodes in spectroscopy and we demonstrated high spatial resolution for photocurrent and photoreflectance measurements.