Polycrystalline IR-Fiber Cables

Core / Clad Polycrystalline Infra-Red (PIR-) fibers are a unique product for a mid-infrared region. The PIR-fibers are very flexible, non-toxic, transparent across a broad spectral range of 4 -18 μm and capable for operating over the wide temperature range – from 4 K to 420 K.

● High transmittance from 4 μm up to 18 μm

● High flexibility and no toxicity

● Suitable for CO2 laser power delivery up to 50 W CW

● Low attenuation at 10.6 μm (0.1-0.5 dB/m)

● Standard fiber diameters from 0.3 to 1.0 mm

● No ageing effect

● Flexible radiometry

● Flexible IR-imaging systems

● Spectroscopy probes for gases and liquids

● Power delivery for CO and CO2-lasers

Standard FibersPIR-240/300PIR-400/500PIR-630/700PIR-900/1000
Core diameter, um240400630900
Cladding diameter, um3005007001000
Minimum bend radius5070100130
Transmission range3 – 18 um
Core materialAgCl 0.25 Br 0.75
Cladding materialAgCl 0.50 Br 0.50
Protective tubingPEEK
Core refractive index2.15
Effective NA0.28±0.03
Operating temperature, °C-270 < T < 140
Maximum transmitted Power, W40 (CW)

Transmission spectra of 1.5m long PIR-900/1000 fiber (red) versus 1,5m long CIR-750/850 fiber (blue), includes Fresnel reflection & coupling losses at fiber ends and absorption bands of atmospheric moisture.

ParameterTypical value CIR-FiberTypical value PIR-Fiber
Transmission range1.5 to 6.0 μm
or 1600 – 6500 cm-1
3 – 18 µm
or 550 – 3300 cm-1
Core/Cladding materialChalcogenide As-S glassesAgCl : AgBr
solid solution crystals
Specific featuresToxic & Fragile
Non-hygroscopic
Non-toxic, Non-hygroscopic,
very flexible – up to plastic deformation, UV-sensitive
Core refractive index2.42.2
Effective NA0.280.25
Optical lossesMin. 0.2 dB/m @ 2 – 4 μmMin. 0.2-0.3 dB/m @ 10-12 μm
Minimum bending radius100 x Fiber diameter
Operating temperature, °C-200 < T < 100-270 < T < 150
Maximum transmitted Power, W150 (CW)