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H2020Individual fellowship2015–2017

NICOS · Nonlinear optical coatings at high intensities

Horizon 2020 — Marie Skłodowska-Curie Actions

Duration
2015-10-01 → 2017-09-30
EU contribution
€171,461
Participants
1
Scheme
MSCA-IF-EF-CAR

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Results in brief

Nonlinear optical coatings at high intensities

In the course of the project, the research fellow developed and characterized dielectric multilayers exhibiting nonlinear properties and satisfying at the same time all the technological requirements for laser applications such as wide transparency range, fast response, and high laser induced damage threshold. In order to use the potential of dielectric coatings as nonlinear optical devices, the researcher carefully explored the behaviour of dielectric multilayers at the intensities, which are, on the one hand, high enough to activate nonlinearities and lower, on other hand, than the laser induced damage threshold. For the first time, accurate characterization of nonlinear effects, in particular Kerr effect, in dielectric coatings was carried out. The research fellow developed a universal method for evaluation of intensity dependent reflectance and transmittance of dielectric multilayers. Due to this method, Kerr coefficients of thin-film dielectric materials typically used in multilayer coatings were reliably determined. It makes possible the incorporation of the nonlinear Kerr effect into multilayer design. The achievement of the project goals was possible due to extensive scientific training, unique research facilities of the host institution as well as the professional toolkit of the researcher. The research fellow acquired new experimental skills and experience with lasers based on thin-disk technology, with two high-vacuum deposition systems and a large variety of measurement devices.

Data: CORDIS, © European Union

Project objective

Optical interference coatings have become a key enabling technology for many laser systems. Modern oscillators and amplifiers are capable of generating ultrashort pulses with energies of several tens of µJ at repetition rates of more than 10 MHz, resulting in several hundreds of watts of average output power. Under the illumination of optical coatings by such intense optical fields, the nonlinear effects manifest themselves. These effects can be exploited for development of novel types of nonlinear optical (NLO) laser components: dielectric multilayer coatings with specified nonlinear properties. In order to use the potential of dielectric coatings as NLO devices, the nonlinear behaviour of dielectric multilayers at intensities which are, from one side, high enough to activate nonlinearities and lower, from other side, than laser damage threshold, has to be carefully explored. As structures of films differ from the ones of bulk materials, then characterization of nonlinear effects in dielectric coatings is to be carried out and numerical values of coatings’ nonlinear parameters are be estimated.NICOS project is aimed at accurate and reliable characterization of nonlinear effects in dielectric coatings and development of new types of NLO dielectric multilayers for laser applications. In order to resolve project tasks, a combination of four main elements is required: (1) laser systems to generate high intensity pulses inducing nonlinear effects in multilayers, (2) deposition plants to produce the coatings, (3) measurement tools to characterize the effects and (4) background in modelling and optical technology. Unique research facilities of the Host Institution together with Applicant’s expertise in optical coatings provide a basis for successful implementation of the project. The results of NICOS will be a valuable contribution to nonlinear optics, laser physics and thin film technology. NICOS will assist in pushing frontiers in promising laser components.

Original text from CORDIS.

Participants

  • MAX-PLANCK-GESELLSCHAFT ZUR FORDERUNG DER WISSENSCHAFTEN EV · MUNCHENCoordinatorGermany

Links

Data: CORDIS, © European Union