LVF Catalog

Fluoride Glass Fibers




Since 1987, LVF is the reference company for astronomy developments operating in K-band (1.9 µm – 2. 4 µm). For more than 30 years, cutting edge solutions and mid infrared fibers have been developed to comply needs of the most innovative astronomical projects:

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):

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.

  • GRAVITY (second-generation very large telescope instrument for precision narrow-angle astrometry and interferometric imaging):

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. (click here to learn more)

  • SPIRou (Near-Infrared Spectropolarimeter for the 3.6 m Canada France Hawaii Telescope):

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. (click here to learn more)

  • EXOMARS (Exobiology on Mars):

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 2.8 µm and 4.5 µm at the entry of EXOMARS in the Martian atmosphere. (click here to learn more)


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