Ho³⁺ doped fluoroaluminate glass fibers for 2.9 µm lasing

Abstract

Ho 3+ doped fluoroaluminate glass fibers based on chemically durable AlF 3 -BaF 2 -YF 3 -PbF 2 -MgF 2 -CaF 2 glasses are fabricated by using a rod-in-tube method. By using an 84 cm long Ho 3+ -doped fluoroaluminate glass fiber as the gain medium and a 1120 nm fiber laser as the pump source, lasing at 2868 nm is obtained, the maximum unsaturated power is about 57 mW for a pump power of 1224 mW, and the corresponding slope efficiency is ~5.1%. The effect of the fiber length on lasing at 2868 nm is also investigated. Our results show that Ho 3+ -doped fluoroaluminate glass fibers are promising gain media for 2.9 µm laser applications.

ZnF2‐modified AlF3‐based fluoride glasses with enhanced mid‐infrared 3.5 μ$\umu$m emission

“…In this work, the investigated glass system has the following molar compositions: 10,15,20,23,25,27,30,35) and 25,30,35). The glass samples utilized were correspondingly named as ZAYSBx and ZAYSBx-3Er.…”

“…In 2018, Jia et al. first demonstrated 2.9 μm fiber laser with output power of 57 mW in Ho 3+ ‐doped fluoroaluminate glass fibers 15 . Later in 2020, Wang et al.…”

“…In 2018, Jia et al first demonstrated 2.9 μm fiber laser with output power of 57 mW in Ho 3+ -doped fluoroaluminate glass fibers. 15 Later in 2020, Wang et al demonstrated a 2.9 μm fiber laser with output power of 173 mW by using Ho 3+ /Pr 3+ co-doped fluoroaluminate glass fibers as the gain medium. 16 More recently, we raised the output power further up to 1.13 W, indicating that fluoroaluminate glass fiber has good potential for high-power ∼3 μm laser applications.…”