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.
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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. DOI:10.1007/s11082-010-9421-z · 1.08 Impact Factor
Conference Paper: Techniques for embedding non-linear materials in TLM[Show abstract] [Hide abstract]
ABSTRACT: Non-linear materials are central to many useful integrated photonics applications. Increasingly complex geometries have to be dealt with in full-wave numerical electromagnetic simulators. In this paper we discuss and present techniques for embedding non-linear material response into one such numerical technique, the Transmission Line Modelling (TLM) Method. We discuss the progression from 1D through to 3D problems using Cartesian geometry as well as the migration to unstructured (triangular, tetrahedral) mesh algorithms.Transparent Optical Networks (ICTON), 2011 13th International Conference on; 07/2011
Conference Paper: Modelling of chalcogenide glass fibre lasers for MIR generation[Show abstract] [Hide abstract]
ABSTRACT: The presentation gives an account of recent developments in the modelling of chalcogenide glass based lanthanide doped fibre lasers for the mid-infra-red (MIR) wavelength range. The particular lanthanide elements considered include dysprosium, praseodymium and terbium. Both classical 3 level lasing systems and cascade lasing systems are considered, and their properties compared. Steady state and pulsed operation of the lasers is considered and the possible application as a seed pump for supercontinuum generation is discussed. Several aspects of numerical methods used specifically for the modelling of MIR fibre lasers are also considered.Transparent Optical Networks (ICTON), 2012 14th International Conference on; 01/2012