Study of the distributed $H$-parameter of an anisotropic optical fiber in a multi-layer coil of a fiberoptic gyroscope

An investigation has been performed on the distributed $H$-parameter in an anisotropic optical fiber with an elliptical strained shell in a multilayer coil of a fiberoptic gyroscope. Each fiber length is $\sim$50 m and there are five layers. Studies have been carried out using three variants of coils. In the first variant, the layers were permeated by epoxy; in the second coil, the layers were permeated with silicon-based material; and, in the third variant, the coils were wound up without impregnation (using dry winding). The different influence of compressive mechanical stresses on the distributed $H$-parameter of the studied fiber has been observed depending on the variant of coil impregnation.