Le Verre Fluoré projects:
IR fiber technology, helping to understand the Universe


Since 1985, Le Verre Fluoré has been the key player in the most innovative astronomical projects, which requires working at the cutting edge of mid infrared fluoride fiber technology. Le Verre Fluoré is proud to be contributing to the understanding of the Universe through the provision of its Mid-IR fluoride glass fibers technology and expertise.

Projects involving Le Verre Fluoré Mid IR fiber technology include:

  • AVIRIS (Airborne Visible InfraRed Imaging Spectrometer),
  • FLUOR (Fiber Linked Unit for Optical Recombination),
  • OHANA (Optical Hawaiian Array for Nanoradian Astronomy),
  • GRAVITY (second-generation very large telescope instrument for precision narrow-angle astrometry and interferometric imaging), ExoMars (Exobiology on Mars),
  • SPIRou (Near-Infrared Spectropolarimeter for the 3.6 m Canada France Hawaii Telescope).



In case of GRAVITY project, unique low birefringence fluoride fibers, combining very low attenuation and dispersion had to be designed and integrated in a system including a delay line and a polarization rotator. Thanks to this system, astronomers can now observe blackholes with a higher resolution.

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In case of EXOMARS project, Le Verre Fluoré developed a fiber optic temperature sensor. This sensor was calibrated in order to measure the CO2 radiations at 2.8µm and 4.5 µm at the entry of EXOMARS in the Martian atmosphere.

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In case of SPIRou project, ultra low loss fluoride optical fibers and unique octagonal fluoride fibers were required. Thoose fibers are now integrated in a near infrared spectropolarimeter and high precision velocimeter. The main scientific objectives of astronomers are the detection of habitable super-Earths around low-mass stars and the study of the magnetic topology of primal stars.

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In case of OHANA, 300 m segments of very low attenuation ZBLAN low birefringence single mode fibers had to be drawn. Pairs of 300 m fibers segments had to exhibit very low differential chromatic dispersion. Thoose fibers are integrated at Mauna Kea Peak (Hawaii) and are used to recombine 7 telescopes together.

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  • Gravity

    GRAVITY: IR fiber technology for investigating black holes.   Black holes are exceptionally dense objects with such strong gravitational pull Read More
  • Exomars

    EXOMARS: fiber optic temperature sensor technology for investigating Mars.   During the entry of the EXOMARS Entry & Descent Module Read More
  • Spirou

    SPIRou: ZBLAN and IR fiber technology for the Canada-France-Hawaii-Telescope.   SPIROU is a near infrared spectropolarimeter and high precision velocimeter, Read More
  • Ohana

    OHANA: Optical Hawaiian Array for Nanoradian Astronomy.   Soon online...               Read More
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