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Home > Research Areas > Microwave, Millimeter and Tera-Hertz Optics

Axis II: Microwave, Millimeter and Tera-Hertz Optics

This axis of research deals with the optical generation, stabilization and processing of microwave signals on an optical carrier.

The target applications are the generation of references of ultra-stable microwave frequencies for the transmission of clock and analog signals on optical carriers. Another side of this research axis is the theoretical and the experimental studies of optical and microwave links as in the most recent radar architectures. It also aims at proposing new architectures of widely tunable and/or ultra-stable optoelectronic oscillators.

The scientific priorities are:

  • passive and active micro-resonators for microwave optoelectronic oscillators,
  • optical amplification of complex radar waveforms,
  • modelling of fiber links and optical-microwave sub-systems,
  • opto-microwave oscillators based on injected dual frequency lasers,
  • optical microwave signal processing,
  • high-rate optical sampling.

As the microwave functions are obtained by optical means in our laboratory, the natural extrapolation of these developments is the frequency upscaling to the millimeter and THz domains. The aimed spectral purity as well as the frequency stability are at the state of the art level. A particular prospect for this research is to prepare the future needs in terms of heterodyne detection at room temperature and ultra-high resolution spectroscopy in the THz domain.

The scientific priorities are:

  • the design and realization of dual frequency THz lasers (doped glasses, doped crystals, VCSEL);
  • the opto-electronic down-conversion and stabilization;
  • the stabilization of THz beatnotes on metrology optical cavities
  • the THz heterodyne detection at room temperature.