In this talk I will present bifurcation analysis of a semiconductor laser receiving delayed filtered optical feedback from two filter loops (2FOF). Specifically, we compute the basic cw-solutions (called external filtered modes EFM) of an underlying delay differential equation model. The EFMs as represented as surfaces in the space of filter phase difference versus frequency and inversion of the laser. In this way, I am able to present a comprehensive geometric picture of how the EFM structure and stability depends on parameters, including the filter detunings and delays. Overall, the study of the EFM-surface is a geometric tool for the multi-parameter analysis of the 2FOF laser, which provides comprehensive insight into the solution structure and dynamics of the system.
Further info on the Dynamical Systems Website.