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NYFORS ReCoater 2 XL


The extended length ReCoater 2 XL™ is used to restore the protective coating on acrylate-coated optical fibers in high strength applications. Designed to process long sections of stripped fiber, it accepts silicone moulds of up to 110 mm length.

Moulds are available in different sizes to cover a range of fiber coating diameters and can easily be exchanged with no realignment required. With standard moulds the recoated part of the fiber is round with a cross section that perfectly and uniformly matches that of the original coating, but moulds can also be selected for both overcoating and undersize recoating of optical fibers. These features as well as the ability to recoat very long stripped fiber sections makes the ReCoater 2 XL™ ideal for research and development operations and small scale production where the fiber type and length need to be changed frequently.

Injection of the recoating compound is performed manually. While this does require a manual user operation, it also ensures flexibility because the user can immediately switch from one type of recoating compound to another (e.g. from a high-index recoating material to a low-index material) without any need to flush out a recoater reservoir and injection pumping system.

This, in addition to the rapidly exchangeable mould sizes and shapes (for uniform diameter and undersize recoating as well as overcoating), ensures the flexibility and adaptability of the extended length ReCoater 2 XL™.

Short curing times are achieved through an efficient UV LED array, arranged along the length of the mould. Curing times depend on the fiber and fiber coating diameter as well as the properties of the customer selected recoating resin, but are typically as short as 3 seconds which allows for very fast recoating operations. The highly efficient light source also makes it possible to cure low-index recoating compounds used in fiber laser manufacturing.

Strength tests can be carried out with linear clamps or mandrels (optional). Linear proof tests can be performed up to 22 N, with programmable levels of force, pulling rates and hold time at maximum force. With the mandrels, tensile tests can be performed with forces up to 100 N. Linear clamps are carefully designed so that the primary coating is not damaged.

The ReCoater 2 XL™ comes in an ergonomic, bench-top design for comfortable operation. The main operator interface is an easy-to-navigate and user-friendly GUI on the touch screen control panel. System software supports storable and user-defined programs for easy process change. Remote monitoring and supervision can be carried out through an Ethernet interface.

Short facts

  • Extended length recoating up to more than 100 mm
  • Easy mould exchange and replacement
  • Handles most fiber dimensions, with custom moulds available
  • Uniform diameter, overcoating and undersize recoating capability
  • Short curing times
  • High and low-index recoating
  • Linear or mandrel strength testing


Technical Data

Curing time  Programmable, 3 s typical
Light source  UV LED
Wavelength  380-385 nm
Mould material  Silicone
Mould mounting  Exchangeable
Mould length  34 mm, 55 mm & 110 mm
Recoating diameter  165, 250, 300, 400, 550, 730 & 900 µm

Proof Testing

Linear proof test  Programmable, 0-22 N
Mandrel tensile test (optional)  Programmable, 0-100 N
Hold time  Programmable
Pull rate  0.5-20 N/s
Display units  lbs, kg, N, kpsi, GPa

Interface & Dimensions

PC connection  Ethernet and USB flash drive connection
Power supply  External 12 V DC, 60 W
Compressed air  Not needed
Dimensions  270 mm (W) x 170 mm (D) x 98 mm (H)
Weight  3.9 kg