Toward an Embedded and Distributed Optical Fiber-Based Dosimeter for Space Applications

We investigated the performance under <tex-math notation="LaTeX">γ </tex-math> - and X-rays of an optical-fiber-based distributed dosimeter consisting of an embedded optical time-domain reflectometry (OTDR) interrogator operating at 1610 nm and a phosphorus-doped, single-mode, size-reduced optical fiber (OF). Results show a linear response from <tex-math notation="LaTeX">10⁻³ </tex-math> to <tex-math notation="LaTeX">10² </tex-math> Gy(SiO2), a proper functioning of the interrogator at least up to doses of 80 Gy(SiO2), and performances comparable with standard-sized distributed dosimetry systems found in the literature.