Affiliation:
1. Friedrich-Alexander University Erlangen Nürnberg FAU
2. Eindhoven University of Technology
3. Optoelectronics Research Centre ORC, University of Southampton
4. Fraunhofer Institute for Technological Trend Analysis INT
Abstract
This Letter reports the first, to the best of our knowledge, spectral radiation induced attenuation (RIA) measurements of nested anti-resonant nodeless hollow-core fibers (NANFs). A 5-tube NANF, alongside a solid-core single-mode radiation resistant fiber (SM-RRF), was irradiated under γ-ray up to 101 kGy (
Si
O
2) and under x-ray up to 241 kGy (
Si
O
2). No RIA was observed in the NANF in the second half of the O-band, the S-band, the C-band, and the L-band. The NANF showed a reduction of absorption bands associated with water and
HCl
under irradiation. Three new attenuation peaks were radiolytically induced and are attributed to the creation of
HN
O
3. These peaks are centered respectively at 1441 nm, 1532 nm, and 1628 nm, with a full width at half maximum (FWHM) of, respectively, 10 nm, 12 nm, and 12 nm. These results demonstrate that the wide bandwidth range of NANFs is essentially unaffected by radiation, but the internal gas contents of the NANF must be managed to avoid producing undesirable spectral features through radiolytic reactions. Wide spectral regions almost unaffected by the ionizing radiation could open new possibilities for the use of NANF in harsh radiation environments.
Subject
Atomic and Molecular Physics, and Optics