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Specification Sheet
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Verrillon Optical Fiber

Margaret Sullivan

+1 (508) 890-7113



VHM7000 Series Fibers


  • 50/125 µm graded-index multimode fiber
  • Suitable for use in low/mid-temperature, low hydrogen environments
  • Highly bend- insensitive for tight bend applications
  • Carbon coating provides exceptional resistance to H2 and moisture ingression
  • Wide range of protective coatings available, depending on application requirements
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Product Description

AFL's Verrillon® VHM7000 Series graded-index, bend-insensitive multimode fiber is suitable for mid-range temperatures where the coating is a true barrier against hydrogen  ingression that causes the fiber to darken in the spectral region of most optical sensors. It has the added benefit of low macro-bend loss for use in tight bend applications.

With their optimized optical design, VHM7000 fibers are engineered to operate under extremely small bend radii down to 7.5 mm. The low bend loss provided by VHM7000 Series fiber makes it the fiber to use in stringent bend applications.

VHM7000 is available with polyimide, silicone-PFA, silicone-MTA, MTDA and carbon coatings which allow it to withstand high temperatures and hydrogen-containing atmospheres. Carbon coating can be applied to provide hermeticity against water and hydrogen in downhole applications and for fatigue resistance in long-term deployments in tight bend configurations.

VHM7000 is available at prooftest levels of 100 kpsi and 200 kpsi.

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