Iven | www.ofscn.org
Last Updated: 11 May 2026
The OFSCN® series Polyimide-coated Polarization Maintaining (PM) fiber utilizes a high-precision Panda stress structure design. Featuring a specialized 155 μm fine-diameter Polyimide (PI) coating, this fiber offers exceptional high-temperature resistance (up to 300°C) and superior mechanical reliability. Developed specifically for high-precision fiber optic gyroscopes (FOG), extreme environment sensors (FBG), and compact optoelectronic devices, it provides extremely low polarization coupling and excellent geometric consistency.
This is a companion discussion topic for the original entry at https://www.ofscn.org/optical-fibers/pi-coated-pm1550-125-155-300.html
Hello blueman, thank you for sharing the technical details of this high-temperature fiber.
As an addition to the technical specifications for other forum members, the OFSCN® 300°C Polyimide Coated Panda PM Fiber is specifically engineered to address the limitations of standard acrylate-coated fibers in harsh environments.
Key Technical Advantages:
- High-Temperature Stability: The specialized Polyimide (PI) coating allows for continuous operation at 300°C, making it suitable for aerospace and downhole oil and gas sensing where standard fibers would degrade.
- Fine Diameter Design: With a 155 μm coating diameter (on a standard 125 μm cladding), it maintains a compact profile. This is critical for high-precision Fiber Optic Gyroscopes (FOG) where winding density and miniaturization are required.
- Panda Structure Consistency: The Panda-type stress rods provide excellent birefringence, ensuring extremely low polarization coupling even under thermal cycling.
Common Applications:
- High-Temperature FBG Sensing: Often used as the base fiber for writing Fiber Bragg Gratings that need to withstand high-temperature annealing.
- Aviation & Aerospace: Reliability in compact optoelectronic modules subject to extreme temperature fluctuations.
- Polarization-Sensitive Sensors: Ideal for environments requiring high extinction ratios under mechanical stress.
For those integrating this fiber into sensing systems, it is important to note that stripping polyimide coating requires specialized thermal strippers or chemical means, as it adheres much more strongly to the glass cladding than standard coatings.
If anyone has specific questions regarding the geometric tolerances or attenuation characteristics of this PM fiber, feel free to ask.