Polycrystalline IR-Fibers

Main features:

  • High transmittance in 3-18 μm range*
  • Low optical losses 0.2 – 0.3 dB/m in 9-13µm range
  • Core/Clad structure with core diameters span from 240 to 860 μm
  • Minimal aging effect
  • Non-hydroscopic and non-toxic
    * See transmission data
Send Inquiry

art photonics developed a volume production technology of a unique product – Core / Clad Polycrystalline Infra-Red (PIR-) fibers transparent over a broad spectral range 3 -18 μm.

Highest performance PIR core/clad fiber  are extruded with core diameters span from 240µm to 860µm. Continuously improved extrusion process provides  a superior optical quality and mechanical strength of PIR- fibers.

Low optical losses without absorption  peaks over the mentioned spectral range  ensure a successful use of PIR- fiber for a broad range of applications.

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

Parameters of standard Polycrystalline fibers

TypeStep Index MultimodeStep Index MultimodeStep Index MultimodeStep Index Multimode
Core Dia., µm240±15400±15600±20860±20
Cladding Dia., µm300+0/-15500+0/-15700+0/-151000+0/-25
Protective Jacket Dia., µmnononono
Min. bending  Radius, mm4575100150



Core/cladding compositionAgCl:AgBr
Spectral Range3 – 18 μm
Core Refractive Index2.15
Fresnel Reflection Losses25%
Attenuation at 10.6 µm0.2 – 0.4 dB/m
Effective Numerical Aperture NA30 +/- 0.05
Melting Point410 °C
Operating Temperature–273 to +140°C
Core/Clad Diameter (standard)see table above
Laser Damage Threshold for CW CO2laser>12 kW/cm²
Tensile Strength> 70 MPa
Minimum Bending Radius (fixed)5 x [Fiber Diameter]
Minimum Elastic Bending Radius150 x [Fiber Diameter]
  • Mid IR spectroscopy
  • Flexible IR pyrometry
  • Flexible IR-Imaging systems
  • Power delivery for QuantumCascade Lasers
  • Power delivery for CO and CO2 Lasers