Fiber optic interferometer and method for determining physical state parameters in the interior of a fiber coil of a fiber optic interferometer

摘要

A fiber-optic interferometer comprising an optical fiber wound to form a fiber coil into which two partial light beams of a first light source can be coupled. The Bragg structure is integrated into the fiber coil. Said Bragg structure comprises an optical fiber having a periodically varying refractive index. In a method for determining physical state parameters in the interior of a fiber coil of a fiber optic interferometer information about physical state parameters in the interior of the fiber coil is obtained on the basis of the reflection wavelength of a Bragg structure comprising an optical fiber having a periodically varying refractive index is integrated into the fiber coil.

主权项

1. A rotation rate sensor comprising a fiber optic interferometer including a first optical fiber, which is wound to form a first fiber coil and into which two partial light beams of a first light source can be coupled,
the fiber optic interferometer further comprising a second optical fiber including a core material, wherein a part of the core material of the second optical fiber is embodied as a Bragg structure having a periodically varying refractive index, the second optical fiber being wound in parallel fashion with respect to the first fiber coil to form a second fiber coil.