Standard Step Index Fibers

Standard Step Index Fibers

SILICA/SILICA Step Index High OH (190-1200nm) and Low OH (300-2400nm) Fibers

OBS Fiber – standard step index fibers
OBS Fiber – Standart step index fibers

High quality Low OH and High OH fibers exhibit exceptional performance and transmission from the deep UV to the IR. With impressive radiation resistance and broad temperature capability, these fibers are ideal for applications including spectroscopy, Thomson scattering, and medical diagnostics.

We offer a choice of several jacket types and sizes – as well as custom-designed products and sizes to meet your specifications.

Technical Data

Type of fiber

High OH (190-1200nm) Fibers

Low OH (300-2400nm) Fibers

OH content

High >700 ppm

Low <1 ppm

Core diameter (µm)

Available from 50µm to 1500µm

Core/Cladding ratios

Standard : 1:1.1 ; Others : 1:1.06 | 1:1.2 | 1:1.4 or customised


0.12±0.02 | 0.22±0.02 | 0.28±0.02 or customised

Standard prooftest

Nylon, ETFE, Acrylate : 100 kpsi ; Polyimide : 70 kpsi

Minimum Bending Radius

50×cladding diameter (short-term mechanical stress)
150×core diameter (during use with high laser power)

OBS Fiber – Standart step index fibers


Industrial / Scientific

  • Replacement for UV Liquid Light Guides
  • Spectroscopy
  • Sensors
  • Photolithography
  • Laser welding / soldering / marking
  • Laser delivery
  • Nuclear plasma diagnostics
  • Analytical instruments
  • Laser diode pigtailing
  • Pyrometry
  • Semiconductor capital equipment
  • Illumination and Monitoring


  • Medical diagnostics
  • Laser delivery
  • Photodynamic Therapy
  • Medical Treatments such as UV Psoriasis