Chalcogenide IR-Fiber Cables
Chalcogenide Infra-Red (CIR-) fibers are based on chalcogenide glasses (As₂ S₃) and are able to transmit IR-radiation in the spectral gap between Silica fibers (0.2 – 2.4 μm) and Polycrystalline Infra-Red (PIR) fibers (4 – 18 μm) in the range of 1.5 – 6 μm.
Our single- and multimode CIR fibers are drawn in core/clad structure with a double polymer coating and characterized by a low optical loss.
● High transmittance from 1.5 μm to 6 μm
● Optical losses 0.2 dB/m at 2 – 4 μm
● Double polymer coating for high flexibility
● Standard fiber diameters from 8 to 500 µm
● Flexible IR-imaging systems
● Remote non-contact pyrometry in the 200 – 600 K range
● Fiber probes for remote process IR – spectroscopy
● Fiber amplifiers and lasers
| Standard Fibers | CIR-8/200 | CIR-250/300 | CIR-350/400 | CIR-500/550 |
| Core diameter, µm | 8 | 250 | 350 | 500 |
| Cladding diameter, µm | 200 | 300 | 400 | 550 |
| Protective coating, µm | 300 | 380 | 510 | 700 |
| Transmission Range | 1.5 – 6 μm |
| Core material | As₂ S₃ |
| Cladding material | As-S |
| Primary protective tubing | PTFE |
| Secondary protective tubing | PVC |
| Core refractive index | 2.4 |
| Effective NA | 0.25 – 0.28 |
| Minimum bending radius | 200 x Fiber diameter |
| Operating temperature, °C | -200 < T < 100 |
| Maximum transmitted Power, W | 1 (CW) |
Transmission spectra of 1.5 m long PIR-900/1000 fiber (red) versus 1,5 m long CIR-750/850 fiber (blue), includes Fresnel reflection & coupling losses at fiber ends and absorption bands of atmospheric moisture.
| Parameter | Typical value CIR-Fiber | Typical value PIR-Fiber |
|---|---|---|
| Transmission range | 1,5 to 6,0μm or 1600 – 6500cm-1 | 3 – 18 µm or 550 – 3300cm-1 |
| Core/Cladding material | Chalcogenide As-S glasses | AgCl : AgBr solid solution crystals |
| Specific Featuresf | Toxic & Fragile Non-hygroscopic | Non-toxic, Non-hygroscopic, very flexible – up to plastic deformation, UV-sensitive |
| Core refractive index | 2.4 | 2.2 |
| Effective NA | 0.28 | 0.25 |
| Optical losses | Min. 0.2 dB/m @ 2 – 4 μm | Min. 0.2-0.3 dB/m @ 10-12 μm |
| Minimum bending radius | 100 x Fiber diameter | |
| Operating temperature, °C | -200 < T < 100 | -270 < T < 150 |
| Maximum transmitted Power, W | 1 | 50 (CW) |