Manufacture and spectroscopic analysis of Tm3+-doped silica glass and microstructure optical fiber through the laser sintering technique

Abstract

We demonstrated how a Tm3+-doped silica glass rod was successfully manufactured by the laser sintering technique and made into a Tm3+-doped microstructure optical fiber by the stack-capillary-draw method. Based on the absorption spectrum, the core glass shows outstanding spectroscopic properties through Judd-Ofelt analysis. The fiber core-cladding structure was preserved completely without any crystallization in the core. Besides, a self-built fiber laser at 1.95 μm produces 740 mW output power with a slope efficiency of 16.73%. The results prove that our laser sintering technique is a promising preparation method to acquire fiber materials for a 2.0 μm laser.