Paper 14090-17
Paper 14090-17
Noise induced modulations in passively mode-locked semiconductor laser with optical self-feedback
13 April 2026 • 14:40 - 15:00 CEST | Leicester/Salon 12 (Niveau/Level 1)
Abstract
Passively mode-locked lasers subject to feedback from an optical external cavity can have relatively small long-term timing jitter if the delay is chosen resonant to the repetition frequency. Despite this positive effect of the feedback, it also induces large timing fluctuations on short time scales. Consequently, the commonly used von Linde and Kéfélian techniques of experimentally estimating the timing jitter can lead to large errors in the estimation of the arrival time of pulses. Adding a second feedback cavity of the appropriate length can significantly suppress the noise-induced modulations induced by the first feedback cavity. With our double delay approach we can thus reduce both, short time-scale fluctuations of the interspike interval time and the variance of the fluctuation of the pulse arrival times on long time scales.
Presenter
Kathy Lüdge
Technische Univ. Ilmenau (Germany)
Prof. Kathy Lüdge is a full professor at the Technische Universität Ilmenau (TU Ilmenau) since 2021, where she is leading the group Computational Physics at the Physics department. From 2016 to 2021, she was a full professor at TU Berlin and headed the group Nonlinear Laser Dynamics. She received her doctorate from TU Berlin in 2003 at the Institute of Solid State Physics in the field of experimental Surface Science. She completed her habilitation (venia legendi) on nonlinear carrier dynamics in quantum-dot lasers in 2011 at the Institute of Theoretical Physics at TU Berlin. For her pioneering works on QD laser modelling she received the Karl Scheel Prize of the Physikalische Gesellschaft zu Berlin in 2012. She won a Humboldt Fellowship (Feodor-Lynen) to spend a year at the Mathematics Department at the University of Auckland (New Zealand) in 2016, was a DAAD supported visiting scientist at the University of Minnesota (USA) in 2002.