Design and Optimisation of S-band fibre optic amplifier
DOI:
https://doi.org/10.54097/1vkzq689Keywords:
S-band, Thulium-doped, Tellurite fibres, Fibre length.Abstract
S-TDFA (S-band thulium-doped fibre amplifier) is a device that uses thulium-doped fibre to achieve the enhancement of optical signals in the S-band (1450-1530 nm), which is of great significance in long-distance optical communication systems, providing high gain, low noise and a wide range of wavelengths. Nowadays, thulium-doped fibre amplifier is one of the research hotspots of fibre-optic communication devices, and how to obtain high signal gain is also of great significance and value.In this paper, based on the energy level structure of thulium ion, the electron jump process, and the characteristics of tellurite glass medium, two physical models, namely, the rate equation of thulium ion's three energy level structure and the power propagation equation, are established.Under the power of 793 nm pump light, 1470 nm signal light and 200 mW pump light, the maximum signal gain of thulium-doped tellurite is 48 dB when the length of the optical fibre is 1.42 m and the thulium-doped ion concentration is ions per square metre, combined with the numerical solution in MATLAB and optimized peak value using a genetic algorithm.
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