The effects of photonic bandgaps on the amplification of light in ytterbium-doped fibres – Niels Bohr Institute - University of Copenhagen

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Niels Bohr Institute > Calendar > 2008 > The effects of photoni...

The effects of photonic bandgaps on the amplification of light in ytterbium-doped fibres

Ytterbium-doped fibres have the potential of providing amplification of light with wavelengths between 975 nm and 1200 nm. However, amplification at the longer wavelengths is limited by amplified noise arising from the shorter wavelengths which experience higher gain in the fibres. The presence of a photonic bandgap in an ytterbium-doped fibre introduces spectral filtering of the wavelengths outside the bandgap. By placing the bandgap towards the longer wavelengths the shorter wavelengths experience greater transmission losses through the fibre compared to the longer wavelengths. This thesis is a study of the effects of introducing these photonic bandgaps on the amplification properties of the fibres.

 

Master thesis defence by Charlotte Falk