Optical sensing fiber

FBGS Technologies GmbH has launched a new line of DTG (Draw Tower Gratings) sensing fibers for use in composite structures to help measure loads in almost any position or environment.

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FBGS Technologies GmbH (Jena, Germany) has launched a new line of DTG (Draw Tower Gratings) sensing fibers for use in composite structures to help measure loads in almost any position or environment. The fibers measure 80 µm in diameter — considerably less than standard 125-µm DTG fibers. FBGS says that because the fiber is thinner:

  • It is less invasive when embedded within laminate composite structures or textiles;
  • It requires less force to strain it, which makes it more suited for acoustic sensors and hydrophones;
  • It is more ”elastic” in respect to its bending properties and can be used in applications where small bend radii are required.

The fiber is drawn with an Ormocer coating that brings the outer fiber diameter to about 114 µm. The new 80µm diameter fiber is said to retain all of the attributes of the larger 125-µm DTG product, including:

  • Extremely high mechanical strength
  • Spliceless FBG chains
  • Low bending loss (high NA fiber)
  • Wide temperature range (cryogenic to >200°C)
  • Ormocer coating
  • Uniform coating even at FBG position

For more information, contact FBGS at info@fbgs.com.