Visible light generation and lasing from a fluoroindate glass fiber

We report on a Dy 3+ -doped fluoroindate glass fiber laser operating in the yellow (∼576 nm) wavelength region that is pumped by a blue GaN diode laser (∼450 nm). Using single-clad Dy 3+ -doped fluoroindate glass fiber with 0.5 mol% concentration and a ∼0.48 m length, a slope efficiency of ∼26.6% and maximum output power of ∼467 mW was produced. This result demonstrates that fluoroindate glass fiber has a sufficiently low background loss at visible wavelengths to support efficient visible light generation. We compared all our measurements with a Dy 3+ -doped fluorozirconate glass fiber and found that most of the laser performance and spectroscopic parameters are similar to ZBLAN. We therefore conclude that fluoroindate glass fiber can be further developed for visible light emission.