Dr. Ralph-Stephan Unger Profile

Dr. Ralph-Stephan Unger

at Ferdinand-Braun-Institut gGmbH

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Publications (2)

Proceedings Article | 12 March 2024 Presentation + Paper

Distributed Bragg reflector tapered diode lasers emitting reliably more than 7 W at 1180 nm

D. Feise, O. Senel, H. Wenzel, P. Della Casa, R.-St. Unger, J. Glaab, K. Paschke

Proceedings Volume 12867, 128670K (2024) https://doi.org/10.1117/12.2692352

KEYWORDS: Semiconductor lasers, Quantum wells, Second harmonic generation, Distributed Bragg reflectors, Waveguides, Reliability, Optical resonators, Semiconducting wafers, Beam quality measurement, Spectral resolution, High power diode lasers

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Proceedings Article | 1 March 2019 Presentation + Paper

High spectral radiance distributed Bragg reflector tapered diode lasers at 1060 nm with novel internal output DBR-grating

D. Feise, D. Jedrzejczyk, D. Krug, N. Werner, F. Bugge, A. Maaßdorf, R.-St. Unger, P. Ressel, K. Paschke

Proceedings Volume 10939, 109391F (2019) https://doi.org/10.1117/12.2511063

KEYWORDS: Reflectivity, Second-harmonic generation, Semiconductor lasers, Electroluminescence, Distributed Bragg reflectors, Laser coagulation, Harmonic generation, Reliability

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