硫系As-S玻璃光纤，可在1.1–6.5μm的光谱范围内传输红外辐射。高性能CIR芯/包层光纤的芯径范围为8µm至500µm。先进的双聚合物护套拉拔工艺为CIR光纤提供了优越的机械强度和高柔韧性。在上述光谱范围内，低的光损耗和小的吸收峰确保了CIR光纤的广泛应用。
硫化物红外光纤
主要特点：
- 1.1-6.5μm范围内的高透射率
- 在2.5–4µm和4.5–5µm时，光学损耗约为0.2–0.3 dB/m
- 芯/包层结构，芯径从8μm到500μm
- 高柔韧性的双聚合物涂层
规格：
| 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±15 | 250±10 | 300±15 | 400±15 | 550±15 |
| Protective Jacket Dia., µm | 400±20 | 410 ± 20 | 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 | see Parameters of standard Chalcogenide fibers |
| Glass Transition Temperature, Tg | 185 °C |
| Operating Temperature | –273°C to +90°C |
| Core/Clad Diameter (standard) | see Parameters of standard Chalcogenide fibers |
| Protective Jacket | Fluoro polymer + PVC |
| Tensile Strength | > 70 MPa |
| Minimum Bending Radius (fixed) | 100x [Fiber Diameter] |
| Minimum Elastic Bending Radius | 200x [Fiber Diameter] |
应用领域：
- 中红外光谱
- 灵活红外测温法
- 灵活的红外成像系统
- 量子级联激光器的功率传输
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