Paper 13346-14
Paper 13346-14
2-µm GaSb-based optically pumped semiconductor membrane laser (MECSEL) (Invited Paper)
29 January 2025 • 8:00 AM - 8:30 AM PST | Moscone Center, Room 212 (Level 2 South)
Abstract
Optically pumped semiconductor disk lasers (i.e. VECSELs or MIXSELs) combine the wavelength versatility and wafer scalability of semiconductors, with high beam quality and good average output power. Both cw and passively modelocked semiconductor disk lasers have been demonstrated in GaAs- and GaSb-based material systems. We have introduced the first GaSb-based membrane external cavity surface emitting laser (MECSEL) at 2.08 µm and report here also the performance parameters for different MECSEL designs.
The first GaSb-based MECSEL, bonded to a SiC heatspreader, generated 1.5 W cw output power with an optical-to-optical efficiency of 5.85 %. A double-pass pump configuration increases efficiency to 8.9 % and cw output power to 2.5 W. An in-well pumped MECSEL generated 1.06 W using single-pass pumping. We further investigate how absorption, efficiency, and threshold power changes based on the locations of the QWs with regards to the standing wave pattern of the lasing or pump electric field.
Presenter
Maximilian C. Schuchter
ETH Zurich (Switzerland), Tampere Univ. (Finland)
Maximilian Constantin Schuchter, born in 2000 in Florida, USA, is a German PhD student working in laser physics and semiconductor technology.
His academic journey began at ETH Zurich, where he earned a Bachelor of Science in Interdisciplinary Sciences, focusing on physics and chemistry. In his bachelor's thesis he worked on the "Characterisation of Membrane Modes”. He continued his education at ETH Zurich, achieving a Master of Science in Interdisciplinary Sciences with a GPA of 5.63 out of 6. He conducted his master’s thesis at the University of California, Berkeley, (UCB) and was titled "Attosecond Noncollinear Four-Wave-Mixing Spectroscopy”.
Since August 2022, he is pursuing a joint doctoral degree at ETH Zurich, Switzerland and Tampere University, Finland. His research focuses on developing Semiconductor Saturable Absorber Mirrors (SESAMs) and high-power, ultrashort Mid-IR semiconductor lasers.