Posted in | Optical Fiber

Chalcogenide Infrared Fibers

Chalcogenide InfraRed (CIR-) As-S glass fibers transmit radiation in the spectral range 1.1 – 6.5 μm. High performance CIR Core/Clad fibers are drawn with the core diameters span from 8 to 500 µm. Advanced drawing process with double polymer jacket provides CIR-fibers with a superior mechanical strength and high flexibility. Low optical losses and small absorption peaks over the mentioned spectral range ensure a successful use of CIR-fibers in a broad range of applications.

Specifications

Parameters of standard Chalcogenide fibers
Code CIR8/300 CIR 50/250 CIR 250/300 CIR 340/400 CIR 500/550
Type Step Index Single-mode Step Index Few-mode Step Index Multimode Step Index Multimode Step Index Multimode
Core Dia., µm 8±1 50±3 250±10 340±10 500±10
Cladding Dia., µm 300±10 250±10 300+10/-15 400+10/-15 550+10/-20
Protective Jacket Dia., µm 400±20 410 ± 30 400 ±30 510 ± 30 700 ± 30
NA 0.25 ± 0.02 0.13 ± 0.02 0.30 ± 0.03 0.30 ± 0.03 0.30 ± 0.03
Min. bending Radius,mm 60 50 60 80 100

 

Specifications
Core/cladding composition As2S3
Spectral Range 1.1 – 6.5 μm
Core Refractive Index 2.42
Fresnel Reflection Losses 31%
Attenuation at 3 – 4 μm & 4.5 µm – 5 µm 0.2 – 0.4 dB/m
Effective Numerical Aperture NA 0.30 +/- 0.05
Glass Transition Temperature, Tg 185 °C
Operating Temperature –273 °C to +90 °C
Core/Clad Diameter (standard) See table above
Protective Jacket Fluoro polymer + PVC
Tensile Strength > 70 MPa
Minimum Bending Radius (fixed) 100x [Fiber Diameter]
Minimum Elastic Bending Radius 200x [Fiber Diameter]

 

Applications

  • Mid IR spectroscopy
  • Power delivery for Quantum Cascade Lasers
  • Flexible IR-imaging Systems
  • Flexible Radiometry
  • Remote non-contact IR pyrometry in the range of 200–600 K

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