Chalcogenide IR-Fibers

Core / Clad Chalcogenide Infra-Red (CIR-) fibers are transparent iver a wide spectral range from 1 to 6 μm, therefore covering a spectral gap between silica and polycrystalline fibers. CIR fibers are used in a variety of applications, including spectroscopy and process monitoring tasks, IR radiation delivery to and out of closed volumes, thermosensing, laser power flexible delivery systems, IR-imaging, etc.

The fibers are provided in standart cable assemblies with 3 connector options, 3 sheathing options, and a line of customized fiber assemblies designed according customer’s request. We provide custom fiber solutions for non-standart tasks. Single-mode and small core fibers are available, along with a special glass compositions for a broader spectral range.

● Fiber type – Step Index Multimode

● Standard fiber diameters from 0.3 to 0.55 mm

● Standard fiber transmittance in 1.1 – 6.5 µm spectral range

● Typical optical losses 0.2 dB/m at 3 – 4 µm

● Double polymer coating for high flexibility

● Spectroscopy Fiber Probes for Mid-IR spectra

● Remote non-contact pyrometry in the 200-600K range

● Flexible Radiometry

● Flexible IR-imaging Systems

● Power delivery for QC – Lasers

Common Parameters

Material Composition As2S3
Spectral Range 1.1 – 6.5 μm
Core Refractive Index 2.4
Fresnel Reflection Losses 31%
Attenuation at at 3 – 4 µm 0.2-0.4 dB/m
Effective Numerical Aperture NA 0.30+/-0.05
Melting Point near 400°C
Operating Temperature -200 to +90°C
Core/Clad Diameter (standard) see table below
Protective Jacket Fluoro polymer + PVC
Tensile Strength > 700 MPa
Minimum Bending Radius (fixed) 100[Fiber Diameter]
Minimum Elastic Bending Radius 200[Fiber Diameter]

 

Chalcogenide Fiber Specification

Code CIR 250/300 CIR 340/400 CIR 500/550 CIR 8/300 CIR 50/250
Type Step Index Multimode Step Index Multimode Step Index Multimode Step Index Singlemode Step Index few modes
Core Diameter, µm 250±10 340±10 500±15 8±1 50±3
Cladding Diameter, µm 300±15 400±15 550±20 300±15 250±10
Polyvinylchloride Protective Jacket Diameter, µm 400±20 500±20 670±20 400±20 350±20
NA 0.25±0.05 0.25±0.05 0.25±0.05 0.25±0.05 0.13±0.02
Minimum Bending Radius (fixed), mm 30 40 50 30 25
Minimum Elastic Bending Radius, mm 60 80 100 60 50

⃰ other diameters are available on request