Simulation of optical feedback propagating through tapered amplifiers
In this work the propagation of optical feedback through tapered amplifiers (TPA) emitting at 1120nm is simulated by a beam propagation method and compared to measurements. The TPA is operated in a master oscillator power amplifier (MOPA) configuration with external optical feedback reflected towards the TPA. The simulation includes a model for the charged carriers and a fast thermal solver, which allows to simulate the spatial emission characteristics of the feedback. With the numerical and experimental results specifications for the feedback tolerance of the master oscillator can be defined and the MOPA system optimized for optical feedback more accurately.
Nils Werner was born in Salzgitter, Germany, in 1990. He received the master's degree in physics from the University of Potsdam, Germany, in 2016. He is with the Ferdinand-Braun-Institut, Berlin, which he joined in 2016 as a PhD student. His research interests include the development of hybrid integrated laser systems with focus on optical feedback aspects, optimization of diode laser systems in the near infrared spectral range as well as second harmonic generation.