Modelling of short-wavelength operation of Nd<sup>3+</sup>doped fluorozirconate glass fiber laser

M. Klimczak; P. Witonski; A. Ryter; R. Piramidowicz

doi:10.1117/12.674820

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26 April 2006 Modelling of short-wavelength operation of Nd³⁺ doped fluorozirconate glass fiber laser

M. Klimczak, P. Witonski, A. Ryter, R. Piramidowicz

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Proceedings Volume 6159, Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments IV; 615928 (2006) https://doi.org/10.1117/12.674820
Event: Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments IV, 2005, Wilga, Poland

Abstract

In this paper we analyze the threshold violet and ultra-violet laser operation in Nd³⁺ doped ZBLAN fibers, using relatively fast and accurate method, based on measured spectroscopic parameters like fluorescence lifetimes and emissiod/absorption cross-sections spectra. Our approach, which is based on energy theorem and threshold field approximation, extends the model presented in [1] by taking into account the longitudinal and transverse field distribution of the fiber laser mode. Specifically, in this work we compare the efficiency of two possible laser pumping schemes: direct and two-photon excitation. The problem of laser resonator optimization is discussed by providing the analytical formulas for small signal gain in active fiber medium as a function of structure parameters i.e. the cavity geometry, distributed losses of the active medium, output power level and the mirror reflectivity. As the result of the carried-out optimizations we can determine the conditions for obtaining short-wavelength lasing in Nd:ZBLAN fiber laser with minimal threshold and maximal output power level.

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M. Klimczak, P. Witonski, A. Ryter, and R. Piramidowicz "Modelling of short-wavelength operation of Nd³⁺ doped fluorozirconate glass fiber laser", Proc. SPIE 6159, Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments IV, 615928 (26 April 2006); https://doi.org/10.1117/12.674820

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