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Comparison of CIR- & PIR Fibers



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

 

No. Parameter Typical value CIR-Fiber Typical value PIR-Fiber
1. Transmission Range 1.5 to 6.0µm
or 1600 - 6500cm-1
3 – 18 µm
or 550 - 3300cm-1
2. Core/Cladding material Chalcogenide As-S glasses AgCl : AgBr
solid solution crystals
3. Specific Features Toxic & Fragile Non-hygroscopic Non-toxic, Non-hygroscopic,
very flexible - up to plastic deformation,
UV-sensitive
4. Core Refractive Index 2.4 2.2
5. Effective NA 0.28 0.25
6. Optical losses Min. 0.2 dB/m @ 2 – 4 µm Min. 0.2-0.3 dB/m @ 10-12 µm
7. Minimum bending radius 100 x Fiber diameter  
8. Operating temperature, °C -200 < T < 100 -270 < T < 150
9. Maximum transmitted Power, W 1 50 (CW)