Spun HiBi Fiber

Bow-Tie spun fiber for Faraday effect current sensors

  • Circularly birefringent
  • Supported by full range of complementary fibers
  • Higher Verdet constant at 1310nm than at 1550nm

Typical Applications:

  • Current sensors
  • Current transformers
  • Faraday effect sensors

The spun HiBi fiber allows highly sensitive and accurate current sensing over a wide range of environmental conditions including temperature variation and vibration, making it suitable for current transformers deployed outdoors in real-life applications. When used in conjunction with Fibercore’s PM fiber for delay lines and ZING for depolarizers, world-class current sensors can be achieved.

Comparison
SHB1250 (7.3/80)–2.5mmSHB1250 (7.3/80)SHB1250 (7.3/125)SHB1500 (8.9/125)
Operating Wavelength (nm)1260-15101260-15101260-15101510-1650
Cut-Off Wavelength (nm)1100-12501100-12501100-12501360-1500
Numerical Aperture0.14-0.170.14-0.170.14-0.170.13-0.16
Mode Field Diameter (μm)6.2-7.8 @1310nm6.2-7.8 @1310nm6.2-7.8 @1310nm7.9-9.9 @1550nm
Attenuation (dB/km)≤5 @1310nm≤5 @1310nm≤5 @1310nm≤3 @1550nm
Circular Beat-Length (mm)63-135 @1310nm63-110 @1310nm63-110 @1310nm86-160 @1550nm
Spin Pitch (mm) Nominal2.54.04.04.0
Proof Test (%)1 (100 kpsi)1 (100 kpsi)1 (100 kpsi)1 (100 kpsi)
Cladding Diameter (μm)80 ± 1.580 ± 1.5125 ± 2125 ± 2
Core Cladding Concentricity (μm)≤1.0≤1.0≤1.0≤1.0
Coating Diameter (μm)165 ± 5165 ± 5245 ± 7245 ± 7
Coating TypeDual Layer AcrylateDual Layer AcrylateDual Layer AcrylateDual Layer Acrylate
Operating Temperature (ºC)-55 to +85-55 to +85-55 to +85-55 to +85