Numerical simulation of multi-color laser generation in TM-doped tellurite 
microsphere at 1.9, 1.5 and 2.3 microns

Anashkina, E. A.; Leuchs, Gerd; Andrianov, A. V.

doi:10.1016/j.rinp.2019.102811

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Numerical simulation of multi-color laser generation in TM-doped tellurite microsphere at 1.9, 1.5 and 2.3 microns

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Leuchs, Gerd
Leuchs Emeritus Group, Emeritus Groups, Max Planck Institute for the Science of Light, Max Planck Society;

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Anashkina, E. A., Leuchs, G., & Andrianov, A. V. (2019). Numerical simulation of multi-color laser generation in TM-doped tellurite microsphere at 1.9, 1.5 and 2.3 microns. RESULTS IN PHYSICS, 16: 102811. doi:10.1016/j.rinp.2019.102811.

Cite as: https://hdl.handle.net/21.11116/0000-000F-9201-A

Abstract

We present the first detailed theoretical analysis of multi-color continuous wave lasing in Tm-doped tellurite spherical microresonators with whispering gallery modes pumped at a wavelength of 792 nm. The numerical model is based on solving a system of equations for intracavity field amplitudes and rate equations using the parameters of Tm-doped tellurite glass measured in the previous experiments. All fundamental whispering gallery modes in the gain bands are taken into account. We demonstrate diagrams of generation regimes depending on Q-factors and pump power, which show a possibility of single-color lasing at a wavelength of similar to 1.9 mu m, two-color lasing at wavelengths of similar to 1.9&1.5 mu m and at similar to 1.9&2.3 mu m, and three-color lasing at wavelengths of similar to 1.9&1.5&2.3 mu m. Such microlasers can play a significant role in sensing applications.