Transient thermal loading induced optical effects in tightly jacketed double-coated optical fibers with interlayer thermal contact resistance

This article investigates the transient microbending loss and refractive index changes in a tightly jacketed double-coated optical fiber subjected to thermal loading with stress-dependent interlayer thermal contact resistance. The effects of interlayer thermal resistance on the transient microbending loss and refractive index changes of the optical fiber are analyzed and discussed. Results show that the stress-dependent interlayer thermal contact resistance increases the lateral pressure induced by the transient thermal loading in the tightly jacketed double-coated optical fiber and, thus, the microbending loss. Similarly, the interlayer thermal contact resistance increases the thermal loading induced refractive index changes in the transient state of the loading.