Applications
Distributed temperature system
Characteristics
Low attenuation at DTS operating wavelengths (1,450 nm, 1,550 nm, and 1,650 nm)
High bandwidth in the C-band (especially at 1,550 nm)
High temperature resistance
Low splicing los
Excellent bending insensitivity
Compared to the Communication Multi-mode Fibre, the DTS-MMF has the Following Advantages:
1. Low attenuation at DTS operating wavelength
With optimized attenuation at 1,450 nm, 1,550 nm, and 1,650 nm, the YOFC DTS-MMF is suitable for longer-distance temperature measurement systems.
2. High bandwidth at 1,550 nm
According to IEC 60793-1-41-2010 (bandwidth), with improved bandwidth test equipment, the measured bandwidth of the YOFC DTS-MMF at 1,550 nm can reach more than 1,000 MHz•km, effectively improving the spatial resolution of long-distance distributed temperature measurement systems.
Specifications
| Fibre type | GI62.5/125-27/250DTS | GI50/125-20/250DTS | |
|---|---|---|---|
| Part No. | GI2015-B | GI2012-B | |
| Optical properties | |||
| NA | 0.275±0.020 | 0.195±0.020 | |
| Loss | @1300nm (dB/km) | ≤0.60 | ≤0.60 |
| @1450nm (dB/km) | ≤0.50 | ≤0.50 | |
| @1550nm (dB/km) | ≤0.40 | ≤0.40 | |
| @1650nm (dB/km) | ≤0.50 | ≤0.50 | |
| Splicing loss (dB) | ≤0.1 | ≤0.1 | |
| Bandwidth | @1300nm (MHz·km) | ≥200 | ≥200 |
| @1550nm (MHz·km) | ≥800 | ≥500 | |
| Geometrical properties | |||
| Core diameter of optical fibre (μm) | 62.5±2.0 | 50.0±2.0 | |
| Cladding diameter (μm) | 125.0±1.0 | 125.0±1.0 | |
| Outer diameter of optical fibre (μm) | 245.0±7.0 | 245.0±7.0 | |
| Core/cladding concentricity (μm) | ≤1.5 | ≤1.5 | |
| Core non-circularity (%) | ≤5.0 | ≤5.0 | |
| Cladding non-circularity (%) | ≤1.0 | ≤1.0 | |
| Mechanical properties | |||
| Proof test level (kpsi) | ≥100 | ≥100 | |
| Environmental properties | |||
| Operating temperature range (°C) | -40 ~ 85 | -40 ~ 85 | |