ClearLite® 1310 nm 0.21 NA PYROCOAT® Optical Fibre
- Technology
- Speciality fibre
- Partner
- Lightera (formerly OFS)
This single-mode optical fibre combines a specialised high-NA core design with a robust Pyrocoat® polyimide coating for demanding applications. It is engineered to maintain low loss even when coiled tightly, improving bend tolerance compared with standard single-mode fibres. The fibre supports reliable operation in high-temperature environments up to 300 °C, making it suitable for harsh industrial, defence, and oil and gas applications. It is designed for efficient signal transmission at both 1310 nm and 1550 nm. The enhanced photosensitive core supports direct Fibre Bragg Grating inscription without hydrogen pre-treatment. Its thin coated diameter also helps save space in compact packaging while retaining compatibility with standard splicing and connector workflows.
The ClearLite® 1310 nm 0.21 NA Pyrocoat® optical fibre is designed for applications where tight bend performance, high-temperature endurance, and mechanical reliability are essential. Its high numerical aperture helps reduce bend-related loss in compact routing and coil designs, while the polyimide coating enables stable operation in harsh environments.
This fibre is well suited for optical sensing, industrial systems, aerospace and defence platforms, and oil and gas instrumentation. Its photosensitive core also makes it a strong choice for Fibre Bragg Grating (FBG) development without hydrogen loading.
Range features
A high level overview of what this range offers
- High 0.21 NA core – Supports tight fibre bends with minimal signal loss for compact routing and coil designs
- Pyrocoat® polyimide coating – Withstands temperatures up to 300 °C for harsh and high-heat environments
- Low attenuation at 1310 nm and 1550 nm – Delivers efficient transmission across key telecom and sensing wavelength windows
- Photosensitive FBG-ready core – Enables direct Fibre Bragg Grating inscription without hydrogen pre-treatment
- 125 µm cladding with 155 µm coated diameter – Preserves compatibility with standard handling while saving space in dense assemblies
- High proof test rating – Proof-tested to ≥ 100 kpsi for strong mechanical reliability during installation and use
- Custom configuration options – Available with optional buffer materials, buffer sizes, metallization, proof test variants, and terminations
Downloads
for ClearLite® 1310 nm 0.21 NA PYROCOAT® Optical Fibre
ClearLite 1310 nm 0.21 NA Pyrocoat Optical Fibre – Datasheet
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All the variants in the range and a comparison of what they offer
Specification | Value |
Product Description | ClearLite POLY 1310 21 NA Optical Fibre |
Coating Material | Pyrocoat® polyimide |
Core Diameter (Nominal) | 4.6 µm |
Cladding Diameter | 125 ± 2 µm |
Coating/Buffer Diameter | 155 ± 5 µm |
Clad Non-Circularity | ≤ 2.0% |
Core/Clad Offset | ≤ 1.0 µm |
Type | Single-Mode |
Operating Wavelength | 1550 nm |
Cutoff Wavelength | ≤ 1290 nm |
Mode Field Diameter @ 1310 nm | 5.1 ± 1.0 µm |
Mode Field Diameter @ 1550 nm | 5.8 ± 1.0 µm |
Attenuation @ 1310 nm | ≤ 1.2 dB/km |
Attenuation @ 1550 nm | ≤ 0.9 dB/km |
Numerical Aperture (Nominal) | 0.21 |
Operating Temperature | –65 °C to +300 °C |
Short-Term Bend Radius | ≥ 10 mm |
Long-Term Bend Radius | ≥ 17 mm |
Proof Test Level | ≥ 100 kpsi (0.689 GPa) |
Order by Part Number | BF06160-02 |
Product Description Code | SMB-G1310H |
Options | Buffer Colour, Buffer Material, Buffer Size, Cutoff Wavelength, Metallization, Proof Test, Termination |
FAQs
for ClearLite® 1310 nm 0.21 NA PYROCOAT® Optical Fibre
A numerical aperture of 0.21 is relatively high for a single-mode fibre and improves the fibre’s ability to guide light under tighter bend conditions. In practical terms, this means the fibre can tolerate smaller bend radii with less added loss than standard lower-NA single-mode fibres, making it suitable for compact routing and tightly coiled designs.
Pyrocoat® polyimide coating is used to extend temperature performance and environmental durability. This fibre is rated for operation from –65 °C to +300 °C, making it suitable for harsh conditions where standard telecom fibre coatings would not be appropriate. The coating also supports use in industrial, aerospace, defence, and downhole sensing environments.
Yes. The fibre features a photosensitive core that supports direct Fibre Bragg Grating inscription without hydrogen loading. This simplifies the development of fibre-optic sensors, wavelength-stabilised laser components, and other grating-based devices.
This fibre is well suited to applications that combine tight bending, mechanical stress, and high-temperature exposure. Typical uses include oil and gas instrumentation, industrial sensing systems, aerospace and defence platforms, compact fibre coils, and other harsh-environment optical assemblies.
Yes. Customisation options include buffer colour, buffer material, buffer size, cutoff wavelength, metallization, proof test, and termination. These options help adapt the fibre for handling, identification, integration, or specific end-use requirements.
The Pyrocoat version uses a high-temperature polyimide coating that offers a much wider operating temperature range and a thinner coated diameter. This makes it better suited for high-heat and space-constrained applications, while standard acrylate-coated fibres are typically chosen for more conventional operating environments.
The specified short-term bend radius is ≥ 10 mm, while the recommended long-term bend radius is ≥ 17 mm. These values help maintain low attenuation and long-term reliability in installation and operational use.
A proof test rating of ≥ 100 kpsi means the fibre has been tensile tested to a high stress level during manufacturing to help screen out critical flaws. This supports strong mechanical reliability during handling, installation, and long-term service.
