Refractivity of P2O5-Al2O3-SiO2 Glass in Optical Fibers

A significant change in the refractive index profiles for the large mode area phosphoroaluminosilicate (PAS) core optical fibers was observed in comparison to that in preforms. This study shows that the refractive index of the PAS core can vary from negative (in preform) to positive (in fiber), and...

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Published in:Photonics 2023-12, Vol.10 (12), p.1383
Main Authors: Likhachev, Mikhail E., Zaushitsyna, Tatiana S., Agakhanova, Vitaliya A., Iskhakova, Liudmila D., Aleshkina, Svetlana S., Bubnov, Mikhail M., Lobanov, Alexey S., Lipatov, Denis S.
Format: Article
Language:English
Subjects:
aluminosilicate glass
Aluminum oxide
Aluminum phosphate
Chemical elements
Fibers
large mode area fibers
Optical fibers
phosphoroaluminosilicate glass
phosphorosilicate glass
Phosphorus pentoxide
Photonics
Preforms
refractive index
Refractivity
Silicon dioxide
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Summary:A significant change in the refractive index profiles for the large mode area phosphoroaluminosilicate (PAS) core optical fibers was observed in comparison to that in preforms. This study shows that the refractive index of the PAS core can vary from negative (in preform) to positive (in fiber), and the difference in the refractive index between the core and preform can exceed a few thousand. By measuring a large set of fibers with different concentrations of P2O5 and Al2O3, we define the refractivity of each dopant (P2O5, Al2O3 and AlPO4 joint) after drawing fiber from the preform and discuss the possible origin of the observed refractive index variation.
ISSN:2304-6732
2304-6732
DOI:10.3390/photonics10121383