Geometric and optical properties of Bi/Er co-doped silica optical fiber

Bi/Er co-doped silica optical fiber is investigated by using first-principle methods. Si–Bi–Er and Si–O–Bi–Er cluster models are constructed based on the interstitial Er-doped 6-membered ring (Int-Er-6MR) model for investigating the geometric and optical properties. The formation energy decreases wi...

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Bibliographic Details
Published in:Optical materials 2020-09, Vol.107, p.110030, Article 110030
Main Authors: Liu, Gang, Wang, Fugang, Guan, Xiaoning, Jia, Baonan, Han, Lihong, Yan, Binbin, Peng, Gang-Ding, Lu, Pengfei
Format: Article
Language:English
Subjects:
Absorption spectra
Bi/Er co-doped
Energy levels
First-principles
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Summary:Bi/Er co-doped silica optical fiber is investigated by using first-principle methods. Si–Bi–Er and Si–O–Bi–Er cluster models are constructed based on the interstitial Er-doped 6-membered ring (Int-Er-6MR) model for investigating the geometric and optical properties. The formation energy decreases with the increase of the Bi–Er bond length, and the Si–O–Bi–Er model is more stable than Si–Bi–Er model. Our results confirm that ~1270 nm luminescence originates from Bi+ ion and ~1530 nm luminescence stems from Er3+ ion. Besides, we discuss the possible energy transfer processes between Bi+ ion and Er3+ ion. •Si–Bi–Er and Si–O–Bi–Er cluster models in Bi/Er co-doped silica fiber are studied.•Classical MD, BSE and HSE methods are applied in this work.•Optical absorption and luminescence of Bi/Er co-doped silica fiber are researched.•Possible energy transfer processes between Bi+ and Er3+ ion are discussed in theory.
ISSN:0925-3467
1873-1252
DOI:10.1016/j.optmat.2020.110030