Influence of Sapphire Sol-Gel Cladding on Tm: YagSingle Crystal Fiber Laser Operation

A sapphire sol-gel cladding (0–5 deposition cycles) was observed to increase the slope efficiency of a 2% Tm-doped single-crystal YAG fiber laser from 16% to 43.5% with respect to transmitted power and reduce the Rayleigh scattering. © 2019 The Author(s)