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Specification Sheet
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Verrillon Optical Fiber

Margaret Sullivan

+1 (508) 890-7113



VHM4000 Series Harsh Environment Fibers


  • Step-index multimode fiber with pure silica core
  • Suitable for applications in hydrogen-rich environments
  • Wide range of protective coatings available, depending on application requirements
  • Excellent for deployment in shallow wells where extremely short spatial resolution is not required
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Product Description

Verrillon® VHM4000 product is a multimode step-index with a pure silica core for high resistance to hydrogen darkening. This product is available in both 50/125 and 62.5/125 versions. This design is available in a variety of coatings including Polyimide, high temperature acrylates, Silicone-PFA and hermetic Carbon. Typically, these fibers are used in down-hole distributed sensing and imaging applications where the temperature and hydrogen partial pressures are extreme. Due to its step index design, the VHM4000 product is suitable for short distance applications where the spatial resolution requirements are not extreme.

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