Simulation of External Cavity and Multi-Section Semiconductor Lasers

General Information

Project type: Research & Development Project
Project heads: Uwe Bandelow, Markus Kantner and Mindaugas Radziunas
Funding period: January 2021 – July 2021, financed by the Ferdinand-Braun-Institute Berlin
Application area: Nano- and Optoelectronics

Project Goals

Narrow-Linewidth laser diodes become increasingly important in metrology and quantum sensing applications. The laser linewidth is fundamentally limited by spontaneous emission into the laser mode and further stochastic process like carrier recombination noise, pump current fluctuations, thermal noise or mechanical vibrations. Significant reduction of the laser linewidth can be achieved by coupling of the laser diode to external resonators and monolithically integrated extended cavity structures, but the approach is limited by dynamical instabilities. The central goals of the research and development project are:

  • Extension of the traveling wave model towards multiple Langevin-type stochastic forces (including also non-Markovian colored noise)
  • Extension of the software package LDSL-tool towards laser linewidth calculations
    • The research results shall assist the development and enhancement of novel laser designs at the Ferdinand-Braun-Institute Berlin.


      • H. Wenzel, M. Kantner, M. Radziunas, U. Bandelow and H.-J. Wünsche: Laser Linewidth Theory Revisited (submitted 2021)
      • M. Radziunas: Traveling wave modeling of nonlinear dynamics in multisection laser diodes. In Handbook of Optoelectronic Device Modeling & Simulation Volume II: Lasers, Modulators, Photodetectors, Solar Cells, and Numerical Methods, pp. 153–182, Ed. J. Piprek (CRC Press, 2017).