Erlangen 2018 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
Q: Fachverband Quantenoptik und Photonik
Q 12: Quantum Optics II
Q 12.2: Vortrag
Montag, 5. März 2018, 14:15–14:30, K 0.016
Time-Resolved Photon Statistics Measurements at Lasing Threshold with Homodyne Detection — •Carolin Lüders, Johannes Thewes, and Marc Aßmann — Experimentelle Physik 2, Technische Universität Dortmund, 44221 Dortmund, Germany
For laser science and application, understanding the temporal dynamics of the lasing transition is crucial. An indicator for characterizing the light state during this process is the second-order correlation function g(2)(τ = 0, t), which distinguishes between Poissonian or thermal photon statistics. However, recording it over longer timescales while maintaining a high time resolution is needed for a detailed analysis. By employing homodyne detection, where a pulsed Local Oscillator field provides temporal selectivity, we observed g(2) of a diode laser with microsecond time resolution. Thus, we were able to investigate its switching between coherent and thermal mode on various time scales. While our findings provide insight in the dynamics of the lasing transition, our method may also be applied to investigate light from samples such as polariton microcavities or to test the fidelity of memories for optical quantum information.