FINE-DIAMETER HEAT-RESISTANT OPTICAL FIBER

摘要

PROBLEM TO BE SOLVED: To provide a fine-diameter heat resistant optical fiber which does not entail degradation in the strength of FRP, even if the optical fiber is embedded into the FRP. SOLUTION: The circumference of a glass fiber 2 of a quartz system consisting of a core and a clad covering the core is coated with an organic heat resistant material (metallic material) 3, by which the optical fiber coating structure is optimized, so that degradation in the transmission characteristic is averted and the degradation in the strength of the FRP is not entailed, even if the optical fiber is embedded into the FRP.