FGC-P Fiber Coating Geometry System

The FGC-P Fiber Coating Geometry System is the fast, reliable solution for measuring the geometry characteristics of optical fiber coatings.

The FGC-P provides a direct measurement of fiber coating geometry parameters including:

  • coating diameter,
  • coating non-circularity, and
  • coating-cladding concentricity.

It can handle fibers with a coating diameter from 100 µm to 260 µm, being able to measure outer and inner coating layers.

The fast and user friendly nature of the FGC-P make it well suited to both production and R&D environments, maintaining excellent levels of repeatability and reliability.

FGC-P coating geometry system
Coating geometry measurement of telecoms fiber

The FGC-P uses a novel liquid cell design that allows it to repeatably measure even very thin fibers, including polarisation maintaining (PM) fibers.

The fiber under test is rotated through 360°, and measured at user-defined intervals, to minimise any measurement uncertainty caused by any asymmetry of the fiber. The ability to measure coatings in up to 36 different radial positions ensures the highest levels of accuracy and reliability for the measurement of diameter, circularity and concentricity.

The FGC-P Fiber Coating Geometry System is fully standards compliant, and uses the side-view reference test method described in IEC-60793-1-21. The FGC-P analyses the side-view grey-scale intensity profile to determine the positions of the coating and cladding boundaries using high-speed video and image processing techniques. The fiber under test is rotated through 360°, and measured at user-defined intervals, to minimise any measurement uncertainty caused by any asymmetry of the fiber.

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