Advanced controllable Raman lasers

  • Lubeigt, Walter (Principal Investigator)

Project: Research

Project Details

Description

"Over the last decade, solid-state lasers have been the subject of great interest with a wide range of applications thanks mostly to their superior output-power-to-wall-plug efficiency. However, the limited availability of colours (wavelengths) produced by these lasers forces the user to compromise by utilising a wavelength that is not ideal for the targeted application. Laser systems based on a nonlinear process, called Stimulated Raman Scattering, offer a simple solution to this need. However, the performance and usability of these so-called Raman lasers have traditionally been limited by thermal distortions inherent to the nonlinear process.

This project will, for the first time, investigate the implementation of the adaptive control techniques - typically used in astronomy- inside Raman lasers to significantly alleviate this thermal issue. In this way, the behaviour and performance of the laser can be remotely controlled and optimised resulting in superior performance in terms of output power, beam quality and usability. This offers the prospect of several genuine breakthroughs including a range of world-firsts and world-records as well as the transfer of these laboratory-based systems into an engineering context.

These significantly enhanced systems will address a wide range of applications including astronomy, environmental monitoring, cosmetics and medicine. For instance, the treatment of a variety of skin diseases such as psoriasis or port wine stain removal will strongly benefit from this project.

Finally, knowledge transfer is an important feature of this project with a full strand of activity dedicated to it. The transfer of this technology will be performed within two high profile research groups at Macquarie University, Australia and at the University of Strathclyde. An industrial collaboration with M Squared Lasers will also take place, particularly targeting commercialisation of the final demonstrator."

Key findings

We have demonstrated the first use of adaptive optics (a well known technique widely used in astronomy) to control and improve high-power solid-state Raman lasers. This led to the development of efficient laser sources operating at wavelengths that are difficult to obtain using traditional gain media. Most notably, power-scaling by ~25% and wavelength selectability of a Nd:YVO4 Raman laser operating in the near-infrared part of the electromagnetic spectrum was reported. In addition, the field of solid-state Raman lasers was also advanced with our report of the first continuous-wave Raman lasers based on a secondary Raman shift.
StatusFinished
Effective start/end date3/12/122/12/14

Funding

  • EPSRC (Engineering and Physical Sciences Research Council): £100,626.00

Research Output

  • 1 Conference contribution book
  • 1 Article
  • 1 Letter

Controllable continuous-wave Nd:YVO4 self-Raman lasers using intracavity adaptive optics

Li, R., Griffith, M., Laycock, L. & Lubeigt, W., 15 Aug 2014, In : Optics Letters. 39, 16, p. 4762-4765 4 p.

Research output: Contribution to journalLetter

Open Access
File
18 Citations (Scopus)
174 Downloads (Pure)

Continuous-wave Nd:YVO4 self-raman lasers based on the 379cm-1 and 893cm-1 shifts

Li, R., Bauer, R. & Lubeigt, W., 2013, Advanced Solid State Lasers. Washington: The Optical Society, p. ATu3A.41

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

  • Continuous-Wave Nd:YVO4 self-Raman lasers operating at 1109nm, 1158nm and 1231nm

    Li, R., Bauer, R. & Lubeigt, W., 17 Jul 2013, In : Optics Express. 21, 15, p. 17745-17750 6 p.

    Research output: Contribution to journalArticle

    Open Access
    File
  • 21 Citations (Scopus)
    161 Downloads (Pure)