Pseudo mode-locking

authored by: Gunter Steinmeyer, Esmerando Escoto, Ayhan Demircan
Abstract: During the last decade, self mode-locking and resulting comb formation have emerged from a controversially discussed anomaly to a hot topic in semiconductor laser physics. Initial experimental reports claimed mode-locking in a cavity lacking the stabilizing action of a saturable absorber [1]. These reports were heavily disputed as coherent artifacts [2] , [3] , i.e., an erroneous interpretation of autocorrelation measurements of a multimode continuous wave laser. While this incorrect interpretation may explain some peculiar reports, there are numerous indications that there really is a mode-locking effect in some other cases. In particular, some experimental reports indicated a threshold-like collapse of the intermode beat linewidth [4] , similar to what is seen in traditional laser mode-locking. Despite numerous attempts to tackle the underlying physical mechanism, it is still not understood how mode-locking can be stabilized without a saturable absorber, defying generally accepted conclusions from the Haus Master Equation [5]. In order to analyze self mode-locking, we rewrote the Master Equation formalism in the frequency domain [6] , converting a partial differential equation into a coupled system of ordinary differential equations.
Organisation(s): PhoenixD: Photonics, Optics, and Engineering - Innovation Across Disciplines
Institute of Quantum Optics
External Organisation(s): Max Born Institute for Nonlinear Optics and Short Pulse Spectroscopy im Forschungsbund Berlin e.V. (MBI)
Humboldt-Universität zu Berlin (HU Berlin)
Deutsches Elektronen-Synchrotron (DESY)
Type: Conference contribution
Publication date: 06.2021
Publication status: Published
Peer reviewed: Yes
ASJC Scopus subject areas: Electronic, Optical and Magnetic Materials, Atomic and Molecular Physics, and Optics
Electronic version(s): https://doi.org/10.1109/CLEO/Europe-EQEC52157.2021.9542233 (Access: Closed)