Berlin 2018 – scientific programme
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HL: Fachverband Halbleiterphysik
HL 36: Focussed Session: Frontiers in Laser Diode Physics I
HL 36.3: Talk
Thursday, March 15, 2018, 10:30–10:45, EW 202
Self-mode locking of VECSELs in the red spectral range — •Marius Großmann1, Roman Bek1, Hermann Kahle1, Arash Rahimi-Iman2, Martin Koch2, Michael Jetter1, and Peter Michler1 — 1Institut für Halbleiteroptik und Funktionelle Grenzflächen, Center for Integrated Quantum Science and Technology (IQST) and SCoPE, University of Stuttgart, Allmandring 3, 70569 Stuttgart — 2Department of Physics and Materials Sciences Center, Philipps-Universität Marburg, Renthof 5, 35032 Marburg
Since the first demonstration of a mode-locked vertical external-cavity surface-emitting laser (VECSEL) using a saturable absorber (SA) in 2000, these lasers have shown diffraction limited beam quality as well as high output powers across multiple emission wavelengths. In 2011, a new technique termed self-mode locking (SML) emerged in the infrared spectral range by abandoning the SA and thereby creating a cavity with outstanding simplicity, which allows emission with pulse lengths down to the sub-picosecond regime.
We recently showed the self-mode locked operation of a red-emitting VECSEL with the gain structure based on the AlGaInP material system. The linear cavity formed by the AlAs/AlGaAs distributed Bragg reflector and a curved outcoupling mirror delivers up to 35 mW of average output power at a repetition rate of 3.5 GHz. Additional measurements are presented with focus on laser pulse properties visible in the radio frequency power spectrum as well as the intensity autocorrelation of the noise-like pulse.