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L805 : Tunable laser for terahertz radiation

technology offers

Lyon Science Transfert offers to grant patent license and looks for industrial partners.


Terahertz radiation can pass through clothing, paper, cardboard, wood, plastic, ceramics... Frequency tuning of such waves could extend their applications to non-destructive imaging of concealed objects or free-space telecommunication, to name a few. The laboratory offers a simple and compact dual wavelength tunable laser system.


The dual wavelength laser is diode-pumped through a bifurcated optical fibre and an adjustable beamsplitter. The emitted beam is constituted of 2 collinear waves with their own frequency and polarization (ordinary and extraordinary waves). Their frequency difference occurs in the terahertz domain. Output mirrors of the dual wavelength laser are replaced by 2 transversally chirped volume Bragg gratings. In this way, the two wavelengths are continuously and simultaneously tunable and consequently their terahertz frequency difference also.


  • Simple and compact
  • Easy to use: tuning by Bragg gratings translation
  • Tuning from 0 up to 14 terahertz
  • Cheap

  • Security: non invasive imaging of concealed objects such as weapons, explosives, contaminated food...
  • Spectroscopy: biological or toxic molecules
  • Telecommunication: Wi-Fi, radars, broadband
  • Medical imaging, safe for humans


Alain Brenier
Institut Lumière Matière (ILM)

Your technology officer
Laetitia ROUX
Tel. +33(0)4 37 37 43 01

Thématique : Chemistry-Materials, Devices