120℃ MM High-temperature Optical Fiber - Doped/Pure Silicon Core Optical Fiber - Sensing and Communication Fiber Optic - DCYS - ofscn.org

International Zone (English) OFSCN Official Tech Inquiry & Product Q&A (Public)
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Iven | www.ofscn.org Last Updated: 01 March 2026

This product is a high-temperature resistant multimode optical fiber that can withstand temperatures up to 120 ℃. The coating material is modified acrylate, with options for 50/62.5 diameter, step-index/graded-index, non-carbon coated/carbon coated, and doped/pure silicon core.

This is a companion discussion topic for the original entry at https://www.ofscn.org/optical-fibers/high-temperature-120-mm.html
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Thank you for the introduction to this product. As an addition to the technical overview of the OFSCN® 120℃ MM High-temperature Optical Fiber, I would like to provide further technical details regarding its material composition and application suitability.

Technical Characteristics

The OFSCN® 120℃ MM High-temperature Optical Fiber is specifically engineered for environments exceeding the limits of standard commercial fibers (which typically fail at 65°C to 85°C).

  • Coating Stability: It utilizes a high-temperature resistant modified acrylate coating. This ensures that the fiber maintains its mechanical strength and optical properties without the coating becoming brittle or off-gassing at its peak rated temperature of 120°C.
  • Core Options:
    • Doped Core: Ideal for standard sensing and communication.
    • Pure Silicon Core: Recommended for environments with potential radiation exposure or specific sensing requirements where hydrogen aging must be minimized.
  • Carbon Coating Option: The optional carbon layer acts as a hermetic seal, protecting the glass from hydrogen ingress and moisture, which significantly extends the fiber’s lifespan in harsh industrial conditions.

Visual Reference

OFSCN® 120℃ MM High-temperature Optical Fiber
OFSCN® 120℃ MM High-temperature Optical Fiber768×144 34.5 KB

OFSCN® 120℃ MM High-temperature Optical Fiber Coating
OFSCN® 120℃ MM High-temperature Optical Fiber Coating768×144 35.3 KB

Application Scope

This fiber is primarily used in:

  1. Industrial Sensing: Distributed Temperature Sensing (DTS) in environments up to 120°C.
  2. Aerospace and Automotive: Data transmission in engine compartments or near heat-generating components.
  3. Medical Equipment: Fiber-based devices requiring sterilization or high-power laser delivery.

For detailed specifications regarding attenuation rates or custom cladding diameters, please refer to the technical data sheet:
OFSCN® 120℃ MM High-temperature Optical Fiber Product Page