Fiber lasers (FLs) have emerged as one of the most promising solid-state laser technologies due to their compactness, high efficiency, excellent beam quality and thermal management enabled by the large surface-to-volume ratio of optical fibers. Among them, Thulium-Doped Fiber Lasers (TDFLs) operating in the 2 µm spectral region have attracted significant interest across a wide range of applications. This spectral window falls within the "eye-safe" band and exhibits strong water absorption peaks, making TDFLs highly effective in medical procedures and LIDAR systems. Moreover, they can be used as pump source for mid-IR systems, which are particularly suitable for remote sensing, environmental monitoring and polymer processing.