Berlin 2008 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 34: Semiconductor Laser
HL 34.2: Vortrag
Mittwoch, 27. Februar 2008, 14:30–14:45, EW 202
Monolithic integration of pump lasers and high-power semiconductor disk lasers — •Wolfgang Diehl1,2, Tony Albrecht1, Peter Brick1, Michael Furitsch1, Stefan Illek1, Stephan Lutgen1, Ines Pietzonka1, Johann Luft1, and Wolfgang Stolz2 — 1Osram Opto Semiconductors, Regensburg, Germany — 2Philipps Universität Marburg, Marburg, Germany
High output power combined with good beam quality and the possibility for wavelength engineering are the main reasons for the great interest in semiconductor disk lasers. One of the major disadvantages is the need for an external optical pump source that requires additional space and precise alignment. Therefore, integration of the pump laser and the disk laser is most desirable.
We demonstrate a novel design to integrate the pump laser monolithically with the semiconductor disk laser in a one-step epitaxy. By careful adjustment of the integrated pump laser and stacking sequence, it is possible to excite different mesa sizes, thus realizing power scalability. In particular, we show experimental results, demonstrating the power scalability and versatility of this design. Results are shown at 1000nm emission wavelength with high output power out of active regions with mesa diameters of 100µm to 400µm. We have demonstrated 1W out of a 100µm mesa and 2.5W out of a 200µm mesa in pulsed operation. Additionally, devices mounted on copper submounts have achieved more than 0.6W in cw operation using a 400µm structure.
In summary, we have pioneered an innovative approach for truly monolithic integration of a semiconductor disk laser with pump lasers.