Designed for high-power 2 µm laser systems, this polarization-maintaining (PM) double-clad thulium-doped fiber features a non-pedestal core architecture, high briefringence, and optimized 790 nm cladding absorption for outsanding efficiency and reliability. The non-pedestal design eliminates parasitic mode guidance, reduces splice sensitivity, and enchances polarization stability, delivering excellent beam quality and a high polarization extinction ratio (PER). Its optimized core composition maximizes cross-relaxation efficiency while supporting robust power scaling.