WG 2

New laser and amplifier devices

Chair: Angela SEDDON, Marian MARCINIAK

Vice-Chairs: Katia GALLO, Irina SORONIKA

This WG will deal with the development of devices based on the new components developed in WG1 and on the optimization of sources using existing compensates . The main activities are:

  1. Modelling laser devices. This activity will include modelling of laser using new active materials (such as Tb) or new type of fibres (such as multi-core fibres). The use of complex algorithms to find optimised solutions based on multiple parameters will also be implemented;
  2. Investigation of MIR sources. The Action will study the first fibre laser above 4 microns using, likely, emission from Dy or Pr ions. Emission at around 8 microns will be evaluated using Tb doping (however this will be a blue-sky research). Availability of new ultra low-loss and highly optically nonlinear fibres will be used to investigate enhanced supercontinuum sources in the MIR, with emission out to 14 micron;
  3. UV/VIS laser generation and its power scaling will be pursued by either direct emission or by nonlinear generation in new micro-structured optical fibres. This will be alongside by more conventional enhanced frequency duplication of highly-coherent IR sources ;
  4. Improved performance of existing laser configuration. New sources may need enhanced pump/seed lasers. Previous activities will benefit from the power scaling of existing lasers as sources in the 1-2 microns range (primary sources for frequency duplications) carried out within this task. The main tasks will be: power scaling (with focus on 2 micron lasers), suppression of modal instability, use of highly-doped materials and use of large-mode area fibres. The development of special components for the achievement of all fibre laser sources will be carried out in connection with WG1. Tuneable, single-frequency, new wavelength lasers sources will be used investigated for enhanced spectroscopy to identify chemical specimens.

Main expected achievements: Modelling and software for complex laser systems: efficient modelling tools for MIR lasers, high-power lasers and continuum generation. Development of MIR continuous wave and enhanced supercontinuum generation in the MIR (up to 14 micron); Solutions provided to modal instabilities in kW level class lasers; The development of >5 mJ pulsed lasers for manufacturing. Power scaling to 4 kW single emitter at 1 micron and 1.5 kW at 2 microns (continuous wave). Efficient and compact all-fibre UV sources. Extension of continuum sources to the UV (down to 250 nm) with a power density level of hundreds of microW/nm to mW/nm, a suitable value for most applications. The Action partners have already connected with several relevant projects to secure funding and with the support of the added value of Action networking they will be able to successfully address Action topics. However a few risks remain. Blue-sky research is aimed at direct laser emission above 6 micron. Front end pumping at 2 microns of soft glasses