Fibre Bragg Gratings

Periodic structures within optical waveguides have long been recognised as being enabling devices for a whole host of applications in many areas of photonics.

The Fibre Grating Group has a long history of working with periodic devices and works on most aspects of periodic structures in optical fibres ranging from fundamental studies of photosensitivity in glasses, over device design and fabrication, to applications of gratings within telecommunication, fibre laser and sensing systems.

Our work covers most aspects of Bragg gratings and quasi phase-matching gratings in silica and non-silica fibres for pulse-shaping, filtering, wavelength conversion and switching applications. We also have activities on active devices including single-frequency Bragg grating fibre lasers, and periodically poled fibres for frequency-conversion and signal-processing applications. Additionally, we are working on design and analysis of low noise wide spectral bandwidth light sources for applications in ultrahigh resolution imaging systems.

Research Facilities

The group has three laboratories within the ORC; two for device fabrication, and one for device characterisation and testing. We have a number of 1D and 2D high-precision airbearing stage systems up to 1m in length, and various continuous-wave and pulsed UV laser sources to facilitate writing of periodic structures in both standard silica as well as non-silica based fibres. We also have IR lasers for femto-second inscription of periodic index structures.

Current research projects

• Periodic structures in highly non-linear materials.
• High power single frequency fibre laser sources.
• Source noise evaluation for OCT applications.
• Long chirped Bragg gratings for high power CPA systems.
• Very large-mode area periodic index structures.

Collaborations

Internal (ORC and UoS): Silica Fibre Fabrication group, Advanced Fibre Technologies & Applications group, Physical Optics group, Advanced Solid-State Sources & Applications group, High Power Fibre Lasers group, Distributed Optical Fibre Sensors group.

Work with us

Please feel free to send us an email to discuss your research interests; they might overlap with what we currently are working on, or what we are interested to work on.

PhD Projects with this group


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