The fiber is expertly protected with a 99.99% 24 kt Gold coating, offering unparalleled performance in demanding applications. This gold coating extends the fiber's usability across a broader temperature range compared to conventional polymer coatings. Furthermore, it provides exceptional protection against chemical corrosion and mechanical stress, making it ideal for use in extreme temperatures and harsh environments. As a conductor of electricity, the gold coating allows for direct termination of the fiber onto the coating, creating a hermetically sealed assembly that enhances durability and reliability.

The manufacturing process of these fibers is designed to reduce stress corrosion susceptibility, thereby offering superior mechanical protection in the most challenging environments. Unlike typical polymers, metal coatings such as Gold exhibit minimal outgassing of volatile components, ensuring the fiber's stability and performance over time. Each gold-coated fiber undergoes rigorous quality testing according to Heracle's stringent procedures, in compliance with the Telecommunications Industry Association (TIA/EIA) and international Fiber Optic Test Procedures (FOTP). Additionally, custom-specific tests can be conducted to verify application requirements, ensuring the fiber meets the exact needs of any project.

These fibers are crafted from pure fused silica step index multimode fibers (SIMM), optimized for use in UV/VIS and VIS/IR wavelengths. The versatility of these fibers is further enhanced by a variety of options and combinations, including all silica, hard clad, single-mode, multimode, step-index, and graded-index configurations. With core diameters ranging from 10 to 2100 µm and numerical apertures up to 0.52, these fibers are designed to meet a wide array of high-temperature applications. The gold coating, combined with silica cladding and optional anti-reflection coatings, ensures that these fibers deliver exceptional performance and reliability in any application.