Polycrystalline IR-Fibers

Main features:

  • High transmittance from 4μm up to 17μm
  • High flexibility
  • Non-hydroscopic and non-toxic
  • Low attenuation at 10.6μm (0.2 – 0.4 dB/m)
  • Core/Clad design to minimize aging effect
  • Suitable for CO-, CO2- QC –  laser power flexible delivery
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art photonics development of specialty fibers for the Mid-Infrared region has resulted in a unique product – Core / Clad Polycrystalline Infra-Red (PIR-) fibers, transparent over a broad spectral range –  4 -18 μm and capable for operating over the wide temperature band from 4K to 420K.

PIR fibers are used for a various applications: spectroscopy and process monitoring, IR radiation delivery to and from the hard-to-reach objects, thermosensing, CO-, CO₂ and QC-laser power delivery systems, IR-imaging and more.

For more information please visit our “Downloads” section and find relative articles at our “Publications” page.


Polycrystalline Fiber Specification
Standard FibersPIR-240/300PIR-400/500PIR-630/700PIR-900/1000
Core diameter, µm240400630900
Cladding diameter, µm3005007001000
Minimum bend radius5070100130
Common Parameters
Transmission Range3 – 17μm
Core materialAgCl0.25Br0.75
Cladding materialAgCl0.50Br0.50
Protective tubingPEEK
Core Refractive Index2.15
Effective NA0.30 ± 0.05
Operating temperature, °C-270 < T < 140
Maximum transmitted Power, W30 (CW)
  • Spectroscopy and process monitoring in Gases & Liquids
  • Pyrometry
  • Flexible Radiometry
  • Flexible IR-imaging Systems
  • Power delivery for CO, CO2 and QC – Lasers