Ultrafast Laser Techniques for Robust Free-Space Optical Communication

About the Project

The project will explore how femtosecond laser pulses can be shaped and controlled to improve the reliability of free-space optical links in the presence of atmospheric turbulence. Free-space optical communication is an emerging technology for high-bandwidth links between ground stations, airborne platforms, and satellites, but atmospheric propagation can strongly distort laser beams. This project will investigate new experimental approaches for mitigating these effects using advanced ultrafast laser techniques.The project is supported by an industrial partner, providing additional opportunities to engage with real-world applications and applied research challenges

The student will build and operate a laboratory testbed based on mode-locked femtosecond lasers, programmable optical shaping technologies, and free-space optical propagation experiments. The work will involve designing and constructing experiments to emulate atmospheric propagation, measuring how ultrashort pulses evolve in such environments, and developing techniques to improve signal transmission through turbulent channels.

This project is strongly experimental but also has scope for some computational work. It offers extensive experience with:

• femtosecond laser systems
• ultrafast optical diagnostics
• programmable pulse shaping technologies
• free-space optical propagation experiments
• optical detection and measurement systems

The student will develop a strong foundation in modern photonics, ultrafast optics, and experimental instrumentation, providing excellent preparation for careers in photonics research, advanced technology industries, or academia.

The studentship is open to applicants eligible for UK Home tuition fees.

Due to the nature of the project, applicants must also be able to satisfy UK Baseline Personnel Security Standard (BPSS) clearance requirements, which include identity verification and the right to live and work in the UK.

Applications will be reviewed on a rolling basis, and interviews may be held as suitable candidates apply. Early application is therefore strongly encouraged. The latest deadline for consideration is 31 August 2026, although the position may be filled earlier if a suitable candidate is identified.

Applicants should send their academic transcript, CV, a brief cover letter and the names and contact details of two referees to Prof John W.G. Tisch (john.tisch@imperial.ac.uk). The cover letter should briefly describe the applicant’s background and interest in experimental photonics or ultrafast optics.

Informal enquiries are welcome.

Funding Notes

Applications are invited for a fully funded 3.5-year PhD studentship starting in October 2026 in the Physics Department at Imperial College London.