Polycrystalline IR-Fibers

Polycrystalline IR-Fibers

Polycrystalline IR-Fibers

Core / Clad Polycrystalline Infra-Red (PIR-) fibers are a unique product that is transparent over a broad spectral range – from 4 to 18 μm. PIR fibers are capable of operaton over a wide temperature range – from 4K to 420K.

Core / Clad Polycrystalline Infra-Red fibers are used in numerous applications, some of which include 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.



Key Features

● High transmittance from 4μm up to 18μm

● 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


● Spectroscopy and process monitoring in gases and liquids

● Pyrometry

● Flexible Radiometry

● Flexible IR-imaging Systems

● Power delivery for CO, CO2 and QC – Lasers




Polycrystalline Fiber Specification

Standard Fibers PIR-240/300 PIR-400/500 PIR-630/700 PIR-900/1000
Core diameter, µm 240 400 630 900
Cladding diameter, µm 300 500 700 1000
Minimum bend radius 50 70 100 130

Common Parameters

Transmission Range 3 – 18μm
Core material AgCl0.25Br0.75
Cladding material AgCl0.50Br0.50
Protective tubing PEEK
Core Refractive Index 2.15
Effective NA 0.28 ± 0.03
Operating temperature, °C -270 < T < 140
Maximum transmitted Power, W 40 (CW)