Available student project - Tracking noisy lasers using digitally enhanced fibre interferometers

Research fields

  • Photonics, Lasers and Nonlinear Optics
  • Engineering in Physics
Two fibre interferometers in passive isolation chambers

Project details

High precision optical metrology requires the development and deployment of highly coherent laser sources. The wavelength stability of laser sources can be further improved using optical frequency references. Typically, optical frequency references are extremely well aligned optical instruments, and are actively isolated to prevent mechanical and thermal disturbances in order to maintain their performance.

In this project, we aim to use passively stabilised optical fibre interferometers to act as an optical frequency reference. Due to the physical robustness of optical fibre and their passive design, these systems may be engineered to be cheap, compact and field deployable. 

In order to achieve the necessary frequency stability, this project investigates the use of digital signal processing techniques to isolate, suppress or correct for several limiting factors in optical fibre. This includes rejection of scattered light and the correction for polarisation drift. The project will have a digital signal processing component, with optional extensions into theoretical modelling and/or optical system design.

Required background

Students will require a background in optics. Prior knowledge of fibre optics and/or digital signal processing is useful but not required.

Project suitability

This research project can be tailored to suit students of the following type(s)
  • PhB (2nd or 3rd year)
  • Honours or MSc project
  • Phd or MPhil

Contact supervisor

Bandutunga , Chathura  profile

Other supervisor(s)

Gray, Malcolm profile

Sibley, Paul profile

Updated:  8 February 2023/ Responsible Officer:  Director, RSPhys/ Page Contact:  Physics Webmaster