Macquarie University
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An integrated hybrid-chip-fibre platform for the generation of mid-infrared light

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posted on 2022-03-28, 11:42 authored by Sobia Rehman
The laser is, without doubt one of the most important, discoveries that have been made in the last century and within a few decades, visible and near-infrared (IR) laser light has found a vast number of important applications in industry and research. The discovery of low-loss optical fibres was another revolutionary step that underpinned the rise of the global telecommunication industry. The mid-IR region of the electromagnetic spectrum spanning from about 2 – 20 μm, has recently been identified as a powerful tool for sensing and medical applications due to the strong and highly specific interaction of light at these wavelengths with molecules. However, while lasers based on silica-fibres have proven to be the most versatile and efficient light sources in the visible and near-IR, those glasses become virtually opaque at mid-IR wavelengths and new solutions are required. In this work, mid-infrared fibre lasers that are based on fluoride-glass optical fibres and on femtosecond laser-inscribed chalcogenide glass integrated chips are investigated. In detail, this project is aimed at studying the feasibility of fabricating a wavelength-selective 3-D integrated coupler in Gallium Lanthanum Sulphide (GLS) glass. The demonstration of the first fibre pigtailed 4-port device in the mid-infrared is a prerequisite for the future realisation of the first fully integrated mid- infrared ring laser. This, in turn, would further open the possibility to develop monolithic all-fibre mode-locked lasers that are based on non-linearly coupled waveguide arrays.


Table of Contents

1. Introduction -- 2. Background theory of mid-infrared fibre lasers -- 3. Ultrafast laser direct inscription technique -- 4. Design, fabrication and characterisation of a fibre-pigtailed coupler for the mid-IR -- 5. Conclusion -- References.


Bibliography: pages 51-53 Empirical thesis.

Awarding Institution

Macquarie University

Degree Type

Thesis MRes


MRes, Macquarie University, Faculty of Science and Engineering, Department of Physics and Astronomy

Department, Centre or School

Department of Physics and Astronomy

Year of Award


Principal Supervisor

Alex Fuerbach

Additional Supervisor 1

Darren Hudson


Copyright Sobia Rehman 2018. Copyright disclaimer:




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