Paper 13100-255
Fibre Bragg Gratings in Few-Mode and Multimode Fibres
On demand | Presented live 20 June 2024
Abstract
Fibre Bragg gratings (FBGs) have found several uses in astronomical instrumentation such as spectral filtering and spectroscopic analysis. FBGs are conventionally inscribed in single-mode fibres where spectral responses are easily modelled and desired features are readily fabricated. Generally, light is coupled into single-mode fibres from multimode fibres using photonic lanterns, which are currently only available in a limited wavelength range, or by accepting a significant coupling loss. Fabrication of FBGs directly in multimode fibres has the potential to reduce coupling losses and output a more versatile beam post-filtering by the FBG. We explore the properties of FBGs fabricated in multimode and few-mode fibres using direct laser writing, discuss the options for their modelling, and consider potential applications for astronomical instrumentation.
Presenter
Polina Zavyalova
Univ. of Toronto (Canada)
Polina Zavyalova received her BSc degree in physics from the University of Toronto. She is currently a PhD student at the Department of Electrical and Computer Engineering at the University of Toronto in the Photonics program studying femtosecond laser microfabrication for astrophotonic applications.