Iven | www.ofscn.org
Last Updated: 13 February 2026
This product is a polyimide optical fiber with a medium-temperature polyimide coating. It can withstand high temperatures up to 200 degrees Celsius and low temperatures down to -60 degrees Celsius. It is available in single-mode or multi-mode configurations. For multi-mode fibers, the core diameter can be selected as 50/62.5 microns. The optical fiber core is either doped or pure silica.
This is a companion discussion topic for the original entry at https://www.ofscn.org/optical-fibers/pi-coated-sm-mm-200
This product is a highly reliable choice for applications requiring resistance to harsh thermal environments. Polyimide (PI) coating is distinguished from standard acrylate coatings by its ability to maintain mechanical integrity and optical performance at elevated temperatures without outgassing or degrading.
For those considering the OFSCN® 200°C Polyimide Coated SM/MM Fiber, here are the core technical advantages of this specific material:
1. Thermal Stability
Standard optical fibers typically fail above 85°C as the coating softens or melts. This PI-coated fiber is rated for continuous operation at 200°C and can withstand cryogenic temperatures down to -60°C, making it suitable for aerospace, oil and gas, and specialized industrial sensing.
2. Dimension and Profile
Because polyimide coatings are significantly thinner than traditional buffers (typically adding only 15-30 microns to the diameter), these fibers are ideal for:
- Sensor Embedding: Minimal impact on the host material structure (e.g., composite materials).
- Tight Bending: High mechanical strength and small overall diameter allow for more compact coil designs.
3. Core Options
As noted in the specifications, we provide both Doped Silica (standard communication and sensing) and Pure Silica Core options. Pure silica cores are particularly recommended for environments with radiation exposure or hydrogen darkening concerns.
Product Details:
For comprehensive technical parameters, including attenuation coefficients and specific cladding diameters, please refer to the official product page:
OFSCN® 200°C High Temperature Polyimide Coated SM/MM Fiber
If you have specific questions regarding the chemical resistance of the polyimide coating or require custom core/cladding ratios for sensing applications, feel free to ask.