7-Rod-Core Thulium-Doped Fiber for Enhanced Fiber Laser Cooling
arXiv:2603.19916
Abstract
Structured-core thulium-doped fibers were developed to reduce heat load, enable shorter-wavelength operation, and achieve a pedestal-free design. In a proof-of-principle experiment, laser slope efficiencies of 52% at 1907 nm and 54% at 1940 nm were achieved with respect to absorbed power.
7 pages, 7 Figures, 1 Table