graduate research events
PhD defence of Mr. Ali Salehiomran -- A Universal Approach to Single Longitudinal Mode Operation in Fiber Lasers
Abstract It is well-known that fiber ring lasers (FRLs) suffer from multiple longitudinal mode (MLM) operation due to their cavity length. Although the average optical output power from an MLM FRL may remain constant, the optical power distribution among the longitudinal modes fluctuates. As a result, the output signal of an MLM FRL is degraded by intensity fluctuations, mode competition, and mode hopping. Therefore, it is desirable to force FRLs to operate in single longitudinal mode (SLM) condition.
Ph.D. Defense of Mr. Alaa Al-Kadry -- Mid-Infrared Soliton Self-Frequency Shift and Supercontinuum Sources Based on As2Se3 Chalcogenide Microwires
In this thesis, we propose tunable mid-Infrared (IR) sources based on the soliton self frequency shift (SSFS) and supercontinuum (SC) generation in As2Se3 microwires. First, we present two methods to maximize the SSFS in microwires with diameter profiles varying non-uniformly along the soliton propagation path. There are two steps in each method. The first step consists in selecting the input microwire diameter that leads to the highest rate of soliton frequency shift per unit length.