The optical properties of chalcogenide glasses: From measurement to electromagnetic simulation tools
ABSTRACT Chalcogenide glasses are promising candidate materials for a wide range of photonics applications. The design and realisation of optical components based on these materials requires detailed information on their optical properties, frequently over a range of wavelengths. In this paper we review experimental refractive index data for three chalcogenide glass compositions, and discuss how various numerical fits to the data prove useful within electromagnetic simulation tools.
- SourceAvailable from: T. Benson[Show abstract] [Hide abstract]
ABSTRACT: A simple Dy3+-doped chalcogenide glass fibre laser design for mid-infrared light generation is studied using a one dimensional rate equation model. The fibre laser design employs the concept of cascade lasing. The results obtained demonstrate that efficient cascade lasing may be achieved in practice without the need for fibre grating fabrication, as a sufficient level of feedback for laser action is provided by Fresnel light reflection at chalcogenide glass fibre–air interfaces. Further enhancement of the laser efficiency can be achieved by terminating one of the fibre ends with a mirror. A numerical analysis of the effect of the Dy3+ doping concentration and fibre loss on the laser operation shows that with 5W of pump power, at 1.71μm wavelength, output powers above 100mW at ∼ 4.5μm wavelength can be achieved with Dy3+ ion concentrations as low as 3×1019cm−3, when fibre loss is of the order 1dB/m. KeywordsFibre lasers–Laser modelling–Mid infrared light–Chalcogenide glass fibresOptical and Quantum Electronics 01/2010; 42(2):69-79. · 1.08 Impact Factor