skip to Main Content


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 6.0µm
or 1600 - 6500cm-1
3 – 18 µm
or 550 - 3300cm-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 µm Min. 0.2-0.3 dB/m @ 10-12 µm
Minimum bending radius100 x Fiber diameter
Operating temperature, °C-200 < T < 100-270 < T < 100
Maximum transmitted Power, W 150(CW)
Back To Top